diff --git a/.openpublishing.redirection.json b/.openpublishing.redirection.json
index e52d2201de..02c81da191 100644
--- a/.openpublishing.redirection.json
+++ b/.openpublishing.redirection.json
@@ -556,6 +556,14 @@
         {
             "source_path": "dotnet-desktop-guide/framework/wpf/properties/dependency-property-callbacks-and-validation.md",
             "redirect_url": "/dotnet/desktop/wpf/advanced/dependency-property-callbacks-and-validation?view=netframeworkdesktop-4.8"
+        },
+        {
+            "source_path": "dotnet-desktop-guide/net/wpf/advanced/read-only-dependency-properties.md",
+            "redirect_url": "/dotnet/desktop/wpf/properties/read-only-dependency-properties?view=netdesktop-6.0"
+        },
+        {
+            "source_path": "dotnet-desktop-guide/framework/wpf/properties/read-only-dependency-properties.md",
+            "redirect_url": "/dotnet/desktop/wpf/advanced/read-only-dependency-properties?view=netframeworkdesktop-4.8"
         }
     ]
 }
diff --git a/dotnet-desktop-guide/framework/winforms/controls/how-to-create-an-unbound-windows-forms-datagridview-control.md b/dotnet-desktop-guide/framework/winforms/controls/how-to-create-an-unbound-windows-forms-datagridview-control.md
index aef2187a83..d882157448 100644
--- a/dotnet-desktop-guide/framework/winforms/controls/how-to-create-an-unbound-windows-forms-datagridview-control.md
+++ b/dotnet-desktop-guide/framework/winforms/controls/how-to-create-an-unbound-windows-forms-datagridview-control.md
@@ -1,5 +1,8 @@
 ---
-title: Create an Unbound DataGridView Control
+title: How to Create an Unbound Windows Forms DataGridView Control
+
+description: Populate an unbound Windows Forms DataGridView Control programmatically and display a small amount of data in a table format without binding it to a data source
+   
 ms.date: "03/30/2017"
 dev_langs: 
   - "csharp"
@@ -11,18 +14,21 @@ helpviewer_keywords:
 ms.assetid: b5d4b47d-9a28-4d88-9dba-0a3c90fba71d
 ---
 # How to: Create an Unbound Windows Forms DataGridView Control
-The following code example demonstrates how to populate a <xref:System.Windows.Forms.DataGridView> control programmatically without binding it to a data source. This is useful when you have a small amount of data that you want to display in a table format.  
+
+The following code example demonstrates how to populate a <xref:System.Windows.Forms.DataGridView> control programmatically without binding it to a data source. This is useful when you have a small amount of data that you want to display in a table format.
   
- For a complete explanation of this code example, see [Walkthrough: Creating an Unbound Windows Forms DataGridView Control](walkthrough-creating-an-unbound-windows-forms-datagridview-control.md).  
+ For a complete explanation of this code example, see [Walkthrough: Creating an Unbound Windows Forms DataGridView Control](walkthrough-creating-an-unbound-windows-forms-datagridview-control.md).
+  
+## Example
   
-## Example  
  [!code-csharp[System.Windows.Forms.DataGridViewSimpleUnbound#00](~/samples/snippets/csharp/VS_Snippets_Winforms/System.Windows.Forms.DataGridViewSimpleUnbound/CS/simpleunbound.cs#00)]
- [!code-vb[System.Windows.Forms.DataGridViewSimpleUnbound#00](~/samples/snippets/visualbasic/VS_Snippets_Winforms/System.Windows.Forms.DataGridViewSimpleUnbound/VB/simpleunbound.vb#00)]  
+ [!code-vb[System.Windows.Forms.DataGridViewSimpleUnbound#00](~/samples/snippets/visualbasic/VS_Snippets_Winforms/System.Windows.Forms.DataGridViewSimpleUnbound/VB/simpleunbound.vb#00)]
   
-## Compiling the Code  
- This example requires:  
+## Compiling the Code
+
+ This example requires:
   
-- References to the System, System.Drawing, and System.Windows.Forms assemblies.  
+- References to the System, System.Drawing, and System.Windows.Forms assemblies.
   
 ## See also
 
diff --git a/dotnet-desktop-guide/framework/winforms/controls/walkthrough-creating-an-unbound-windows-forms-datagridview-control.md b/dotnet-desktop-guide/framework/winforms/controls/walkthrough-creating-an-unbound-windows-forms-datagridview-control.md
index bfb230f8d4..6b8c7cdf0d 100644
--- a/dotnet-desktop-guide/framework/winforms/controls/walkthrough-creating-an-unbound-windows-forms-datagridview-control.md
+++ b/dotnet-desktop-guide/framework/winforms/controls/walkthrough-creating-an-unbound-windows-forms-datagridview-control.md
@@ -1,5 +1,8 @@
 ---
-title: Create an Unbound DataGridView Control
+title: Walkthrough to Creating an Unbound Windows Forms DataGridView Control
+
+description: You can create an Unbound Windows Forms DataGridView Control and display a small amount of data without binding it to a data source
+
 ms.date: "03/30/2017"
 dev_langs: 
   - "csharp"
@@ -13,13 +16,14 @@ helpviewer_keywords:
 ms.assetid: 5a8d6afa-1b4b-4b24-8db8-501086ffdebe
 ---
 # Walkthrough: Creating an Unbound Windows Forms DataGridView Control
+
 You may frequently want to display tabular data that does not originate from a database. For example, you may want to show the contents of a two-dimensional array of strings. The <xref:System.Windows.Forms.DataGridView> class provides an easy and highly customizable way to display data without binding to a data source. This walkthrough shows how to populate a <xref:System.Windows.Forms.DataGridView> control and manage the addition and deletion of rows in "unbound" mode. By default, the user can add new rows. To prevent row addition, set the <xref:System.Windows.Forms.DataGridView.AllowUserToAddRows%2A> property is `false`.  
   
  To copy the code in this topic as a single listing, see [How to: Create an Unbound Windows Forms DataGridView Control](how-to-create-an-unbound-windows-forms-datagridview-control.md).  
   
 ## Creating the Form  
   
-#### To use an unbound DataGridView control  
+### To use an unbound DataGridView control  
   
 1. Create a class that derives from <xref:System.Windows.Forms.Form> and contains the following variable declarations and `Main` method.  
   
@@ -64,16 +68,18 @@ You may frequently want to display tabular data that does not originate from a d
      [!code-csharp[System.Windows.Forms.DataGridViewSimpleUnbound#10](~/samples/snippets/csharp/VS_Snippets_Winforms/System.Windows.Forms.DataGridViewSimpleUnbound/CS/simpleunbound.cs#10)]
      [!code-vb[System.Windows.Forms.DataGridViewSimpleUnbound#10](~/samples/snippets/visualbasic/VS_Snippets_Winforms/System.Windows.Forms.DataGridViewSimpleUnbound/VB/simpleunbound.vb#10)]  
   
-## Testing the Application  
+## Testing the Application
+
  You can now test the form to make sure it behaves as expected.  
   
-#### To test the form  
+### To test the form  
   
 - Press F5 to run the application.  
   
      You will see a <xref:System.Windows.Forms.DataGridView> control that displays the songs listed in `PopulateDataGridView`. You can add new rows with the **Add Row** button, and you can delete selected rows with the **Delete Row** button. The unbound <xref:System.Windows.Forms.DataGridView> control is the data store, and its data is independent of any external source, such as a <xref:System.Data.DataSet> or an array.  
   
-## Next Steps  
+## Next Steps
+  
  This application gives you a basic understanding of the <xref:System.Windows.Forms.DataGridView> control's capabilities. You can customize the appearance and behavior of the <xref:System.Windows.Forms.DataGridView> control in several ways:  
   
 - Change border and header styles. For more information, see [How to: Change the Border and Gridline Styles in the Windows Forms DataGridView Control](change-the-border-and-gridline-styles-in-the-datagrid.md).  
diff --git a/dotnet-desktop-guide/framework/wpf/advanced/how-to-alter-the-typography-of-text.md b/dotnet-desktop-guide/framework/wpf/advanced/how-to-alter-the-typography-of-text.md
index 112bda7db1..25051f8326 100644
--- a/dotnet-desktop-guide/framework/wpf/advanced/how-to-alter-the-typography-of-text.md
+++ b/dotnet-desktop-guide/framework/wpf/advanced/how-to-alter-the-typography-of-text.md
@@ -1,5 +1,8 @@
 ---
-title: "How-to: Alter the Typography of Text"
+title: How to Alter the Typography of Text
+
+description: To alter the telegraphy of text, set the telegraphy attribute. You can set the typographic property of text programmatically. You can see how altered and default telegraphy properties of text render on screen each with an example.
+
 ms.date: "03/30/2017"
 dev_langs: 
   - "csharp"
@@ -10,24 +13,27 @@ helpviewer_keywords:
 ms.assetid: 19a3b49b-60a2-4c11-a786-e26b4c965588
 ---
 # How-to: Alter the Typography of Text
-The following example shows how to set the <xref:System.Windows.Documents.TextElement.Typography%2A> attribute, using <xref:System.Windows.Documents.Paragraph> as the example element.  
+
+The following example shows how to set the <xref:System.Windows.Documents.TextElement.Typography%2A> attribute, using <xref:System.Windows.Documents.Paragraph> as the example element.
   
-## Example  
- [!code-xaml[TextElementSnippets#_TextElement_TypogXAML](~/samples/snippets/csharp/VS_Snippets_Wpf/TextElementSnippets/CSharp/Window1.xaml#_textelement_typogxaml)]  
+## Example 1: To show how altered and default typographic properties of text render on screen
+
+ [!code-xaml[TextElementSnippets#_TextElement_TypogXAML](~/samples/snippets/csharp/VS_Snippets_Wpf/TextElementSnippets/CSharp/Window1.xaml#_textelement_typogxaml)]
   
- The following figure shows how this example renders.  
+ The following figure shows how this example renders.
   
- ![Screenshot: Text with altered typography](./media/textelement-typog.png "TextElement_Typog")  
+ ![Screenshot: Text element with altered typography](./media/textelement-typog.png "TextElement_Typog")
   
- In contrast, the following figure shows how a similar example with default typographic properties renders.  
+ In contrast, the following figure shows how a similar example with default typographic properties renders.
   
- ![Screenshot: Text with altered typography](./media/textelement-typog-default.png "TextElement_Typog_Default")  
+ ![Screenshot: Text element with default typography](./media/textelement-typog-default.png "TextElement_Typog_Default")
   
-## Example  
- The following example shows how to set the <xref:System.Windows.Controls.TextBox.Typography%2A> property programmatically.  
+## Example 2: To show how to set typographic property of text programmatically
+
+ The following example shows how to set the <xref:System.Windows.Controls.TextBox.Typography%2A> property programmatically.
   
  [!code-csharp[TextElementSnippets#_TextElement_Typog](~/samples/snippets/csharp/VS_Snippets_Wpf/TextElementSnippets/CSharp/Window1.xaml.cs#_textelement_typog)]
- [!code-vb[TextElementSnippets#_TextElement_Typog](~/samples/snippets/visualbasic/VS_Snippets_Wpf/TextElementSnippets/visualbasic/window1.xaml.vb#_textelement_typog)]  
+ [!code-vb[TextElementSnippets#_TextElement_Typog](~/samples/snippets/visualbasic/VS_Snippets_Wpf/TextElementSnippets/visualbasic/window1.xaml.vb#_textelement_typog)]
   
 ## See also
 
diff --git a/dotnet-desktop-guide/net/wpf/properties/read-only-dependency-properties.md b/dotnet-desktop-guide/net/wpf/properties/read-only-dependency-properties.md
new file mode 100644
index 0000000000..238ad4277b
--- /dev/null
+++ b/dotnet-desktop-guide/net/wpf/properties/read-only-dependency-properties.md
@@ -0,0 +1,67 @@
+---
+title: "Read-only dependency properties"
+description: Learn about dependency properties in Windows Presentation Foundation (WPF) and how to create a read-only dependency property.
+ms.date: "11/29/2021"
+dev_langs:
+  - "csharp"
+  - "vb"
+helpviewer_keywords:
+  - "dependency properties [WPF], read-only"
+  - "read-only dependency properties [WPF]"
+---
+<!-- The acrolinx score was 94 on 11/29/2021-->
+
+# Read-only dependency properties (WPF .NET)
+
+You can use read-only dependency properties to prevent property values being set from outside your code. This article discusses existing read-only dependency properties and the scenarios and techniques for creating a custom read-only dependency property.
+
+[!INCLUDE [desktop guide under construction](../../includes/desktop-guide-preview-note.md)]
+
+## Prerequisites
+
+The article assumes a basic knowledge of dependency properties, and that you've read [Dependency properties overview](dependency-properties-overview.md). To follow the examples in this article, it helps if you're familiar with Extensible Application Markup Language (XAML) and know how to write WPF applications.
+
+## Existing read-only dependency properties
+
+Read-only dependency properties typically report state, and shouldn't be modifiable through a `public` accessor. For example, the Windows Presentation Foundation (WPF) framework implements the <xref:System.Windows.UIElement.IsMouseOver%2A> property as read-only because its value should only be determined by mouse input. If `IsMouseOver` allowed other inputs, its value might become inconsistent with mouse input. Though not settable through a `public` accessor, many existing read-only dependency properties have values determined by multiple inputs.
+
+## Uses of read-only dependency properties
+
+Read-only dependency properties aren't applicable in several scenarios where dependency properties normally offer a solution. Non-applicable scenarios include data binding, applying a style to a value, validation, animation, and inheritance. However, a read-only dependency property can be used as a property trigger in a style. For example, <xref:System.Windows.UIElement.IsMouseOver%2A> is commonly used to trigger changes to the background, foreground, or other visible property of a control when the mouse is over it. The WPF property system detects and reports changes in read-only dependency properties, thus supporting property trigger functionality. Read-only dependency properties are also useful when implementing a collection-type dependency property where only the collection elements need to be writeable, not the collection object itself. For more information, see [Collection-type dependency properties](collection-type-dependency-properties.md).
+
+> [!NOTE]
+> Only dependency properties, not regular common language runtime properties, can be used as property triggers in a style.
+
+## Creating custom read-only dependency properties
+
+Before creating a dependency property that's read-only, check the [non-applicable scenarios](#uses-of-read-only-dependency-properties).
+
+The process of creating a read-only dependency property is in many ways similar to creating read-write dependency properties, with these distinctions:
+
+- When registering your read-only property, call <xref:System.Windows.DependencyProperty.RegisterReadOnly%2A> instead of <xref:System.Windows.DependencyProperty.Register%2A>.
+
+- When implementing the CLR property wrapper, make sure it doesn't have a public `set` accessor.
+
+- `RegisterReadOnly` returns <xref:System.Windows.DependencyPropertyKey> instead of <xref:System.Windows.DependencyProperty>. Store the `DependencyPropertyKey` in a nonpublic class member.
+
+You can determine the value of your read-only dependency property using whatever logic you choose. The recommended way to set the property value, either initially or as part of runtime logic, is to use the overload of <xref:System.Windows.DependencyObject.SetValue%2A> that accepts a parameter of type `DependencyPropertyKey`. Using `SetValue` is preferable to circumventing the property system and setting the backing field directly.
+
+How and where you set the value of a read-only dependency property within your application will affect the access level you assign to the class member that stores the `DependencyPropertyKey`. If you only set the property value from within the class that registers the dependency property, you can use a `private` access modifier. For scenarios where the values of dependency properties affect each other, you can use paired <xref:System.Windows.PropertyChangedCallback> and <xref:System.Windows.CoerceValueCallback> callbacks to trigger value changes. For more information, see [Dependency property metadata](dependency-property-metadata.md).
+
+If you need to change the value of a read-only dependency property from outside the class that registers it, you can use an `internal` access modifier for the `DependencyPropertyKey`. For example, you might call `SetValue` from an event handler in the same assembly. The following example defines an Aquarium class that calls `RegisterReadOnly` to create the read-only dependency property `FishCount`. The `DependencyPropertyKey` is assigned to an `internal static readonly` field, so that code in the same assembly can change the read-only dependency property value.
+
+:::code language="csharp" source="./snippets/read-only-dependency-properties/csharp/MainWindow.xaml.cs" id="RegisterReadOnlyDependencyProperty":::
+:::code language="vb" source="./snippets/read-only-dependency-properties/vb/MainWindow.xaml.vb" id="RegisterReadOnlyDependencyProperty":::
+
+Because the WPF property system doesn't propagate the <xref:System.Windows.DependencyPropertyKey> outside your code, read-only dependency properties have better write security than read-write dependency properties. Use a read-only dependency property when you want to limit write-access to those who have a reference to the `DependencyPropertyKey`.
+
+In contrast, the dependency property identifier for read-write dependency properties is accessible through the property system, no matter what access modifier you assign it. For more information, see [Dependency property security](/dotnet/desktop/wpf/advanced/dependency-property-security?view=netframeworkdesktop-4.8&preserve-view=true).
+
+## See also
+
+- [Dependency properties overview](dependency-properties-overview.md)
+- [Implement a Dependency property](how-to-implement-a-dependency-property.md)
+- [Custom dependency properties](custom-dependency-properties.md)
+- [Collection-type dependency properties](collection-type-dependency-properties.md)
+- [Dependency property security](/dotnet/desktop/wpf/advanced/dependency-property-security?view=netframeworkdesktop-4.8&preserve-view=true)
+- [Styles and templates in WPF](/dotnet/desktop/wpf/controls/styles-templates-overview)
diff --git a/dotnet-desktop-guide/net/wpf/properties/snippets/attached-properties-overview/csharp/CodeSampleCsharp.csproj b/dotnet-desktop-guide/net/wpf/properties/snippets/attached-properties-overview/csharp/CodeSampleCsharp.csproj
index 8824b2f16a..22d78ee6d6 100644
--- a/dotnet-desktop-guide/net/wpf/properties/snippets/attached-properties-overview/csharp/CodeSampleCsharp.csproj
+++ b/dotnet-desktop-guide/net/wpf/properties/snippets/attached-properties-overview/csharp/CodeSampleCsharp.csproj
@@ -2,7 +2,7 @@
 
   <PropertyGroup>
     <OutputType>WinExe</OutputType>
-    <TargetFramework>net5.0-windows</TargetFramework>
+    <TargetFramework>net6.0-windows</TargetFramework>
     <UseWPF>true</UseWPF>
   </PropertyGroup>
 
diff --git a/dotnet-desktop-guide/net/wpf/properties/snippets/attached-properties-overview/vb/CodeSampleVb.vbproj b/dotnet-desktop-guide/net/wpf/properties/snippets/attached-properties-overview/vb/CodeSampleVb.vbproj
index c7ae1cc7ce..34db9b0460 100644
--- a/dotnet-desktop-guide/net/wpf/properties/snippets/attached-properties-overview/vb/CodeSampleVb.vbproj
+++ b/dotnet-desktop-guide/net/wpf/properties/snippets/attached-properties-overview/vb/CodeSampleVb.vbproj
@@ -2,7 +2,7 @@
 
   <PropertyGroup>
     <OutputType>WinExe</OutputType>
-    <TargetFramework>net5.0-windows</TargetFramework>
+    <TargetFramework>net6.0-windows</TargetFramework>
     <RootNamespace>CodeSampleVb</RootNamespace>
     <UseWPF>true</UseWPF>
   </PropertyGroup>
diff --git a/dotnet-desktop-guide/net/wpf/properties/snippets/collection-type-dependency-properties/csharp/CodeSampleCsharp.csproj b/dotnet-desktop-guide/net/wpf/properties/snippets/collection-type-dependency-properties/csharp/CodeSampleCsharp.csproj
index 8824b2f16a..22d78ee6d6 100644
--- a/dotnet-desktop-guide/net/wpf/properties/snippets/collection-type-dependency-properties/csharp/CodeSampleCsharp.csproj
+++ b/dotnet-desktop-guide/net/wpf/properties/snippets/collection-type-dependency-properties/csharp/CodeSampleCsharp.csproj
@@ -2,7 +2,7 @@
 
   <PropertyGroup>
     <OutputType>WinExe</OutputType>
-    <TargetFramework>net5.0-windows</TargetFramework>
+    <TargetFramework>net6.0-windows</TargetFramework>
     <UseWPF>true</UseWPF>
   </PropertyGroup>
 
diff --git a/dotnet-desktop-guide/net/wpf/properties/snippets/collection-type-dependency-properties/csharp/MainWindow.xaml b/dotnet-desktop-guide/net/wpf/properties/snippets/collection-type-dependency-properties/csharp/MainWindow.xaml
index e3a44ded53..ea238ef0d4 100644
--- a/dotnet-desktop-guide/net/wpf/properties/snippets/collection-type-dependency-properties/csharp/MainWindow.xaml
+++ b/dotnet-desktop-guide/net/wpf/properties/snippets/collection-type-dependency-properties/csharp/MainWindow.xaml
@@ -1,11 +1,12 @@
 <Window x:Class="CodeSampleCsharp.MainWindow"
     xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
-    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" xmlns:src="clr-namespace:CodeSampleCsharp"
-        Title="Collection-Type Dependency Properties" Height="100" Width="400">
+    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
+        Title="Collection-Type Dependency Properties" Height="100" Width="500">
 
     <StackPanel>
 
-        <Button Click="InitializeAquariums">Set collection default value in class constructor</Button>
+        <Button Click="InitializeAquariums">Set collection default value in class constructor (Aquarium)</Button>
+        <Button Click="InitializeFreezableAquariums">Set collection default value in class constructor (FreezableCollection Aquarium)</Button>
 
     </StackPanel>
 </Window>
diff --git a/dotnet-desktop-guide/net/wpf/properties/snippets/collection-type-dependency-properties/csharp/MainWindow.xaml.cs b/dotnet-desktop-guide/net/wpf/properties/snippets/collection-type-dependency-properties/csharp/MainWindow.xaml.cs
index ab9914b536..49d4a16cea 100644
--- a/dotnet-desktop-guide/net/wpf/properties/snippets/collection-type-dependency-properties/csharp/MainWindow.xaml.cs
+++ b/dotnet-desktop-guide/net/wpf/properties/snippets/collection-type-dependency-properties/csharp/MainWindow.xaml.cs
@@ -16,10 +16,15 @@ private void InitializeAquariums(object sender, RoutedEventArgs e)
             aquarium1.AquariumContents.Add(new Fish());
             aquarium2.AquariumContents.Add(new Fish());
             MessageBox.Show(
-                $"Aquarium1 contains {aquarium1.AquariumContents.Count} fish\r\n" +
-                $"Aquarium2 contains {aquarium2.AquariumContents.Count} fish");
+                $"aquarium1 contains {aquarium1.AquariumContents.Count} fish\r\n" +
+                $"aquarium2 contains {aquarium2.AquariumContents.Count} fish");
         }
         //</InitializeAquariums>
+
+        private void InitializeFreezableAquariums(object sender, RoutedEventArgs e)
+        {
+            FreezableCollectionAquarium.InitializeAquariums();
+        }
     }
 
     //<SetCollectionDefaultValueInConstructor>
@@ -36,16 +41,12 @@ public class Aquarium : DependencyObject
               //typeMetadata: new FrameworkPropertyMetadata(new List<FrameworkElement>())
             );
 
-        // Store the dependency property identifier as a static member of the class.
-        public static readonly DependencyProperty AquariumContentsProperty =
-            s_aquariumContentsPropertyKey.DependencyProperty;
-
         // Set the default collection value in a class constructor.
         public Aquarium() => SetValue(s_aquariumContentsPropertyKey, new List<FrameworkElement>());
 
-        // Declare a read-only property.
+        // Declare a public get accessor.
         public List<FrameworkElement> AquariumContents =>
-            (List<FrameworkElement>)GetValue(AquariumContentsProperty);
+            (List<FrameworkElement>)GetValue(s_aquariumContentsPropertyKey.DependencyProperty);
     }
 
     public class Fish : FrameworkElement { }
@@ -61,8 +62,8 @@ private static void InitializeAquariums()
             aquarium2.AquariumContents.Add(new Fish());
             aquarium2.AquariumContents = new List<FrameworkElement>();
             MessageBox.Show(
-                $"Aquarium1 contains {aquarium1.AquariumContents.Count} fish\r\n" +
-                $"Aquarium2 contains {aquarium2.AquariumContents.Count} fish");
+                $"aquarium1 contains {aquarium1.AquariumContents.Count} fish\r\n" +
+                $"aquarium2 contains {aquarium2.AquariumContents.Count} fish");
         }
 
         //<ReadWriteDependencyProperty>
@@ -81,7 +82,7 @@ public class Aquarium : DependencyObject
             // Set the default collection value in a class constructor.
             public Aquarium() => SetValue(AquariumContentsProperty, new List<FrameworkElement>());
 
-            // Declare a read-write property.
+            // Declare public get and set accessors.
             public List<FrameworkElement> AquariumContents
             {
                 get => (List<FrameworkElement>)GetValue(AquariumContentsProperty);
@@ -102,8 +103,8 @@ public static void InitializeAquariums()
             aquarium1.AquariumContents.Add(new Fish());
             aquarium2.AquariumContents.Add(new Fish());
             MessageBox.Show(
-                $"Aquarium1 contains {aquarium1.AquariumContents.Count} fish\r\n" +
-                $"Aquarium2 contains {aquarium2.AquariumContents.Count} fish");
+                $"FreezableCollection aquarium1 contains {aquarium1.AquariumContents.Count} fish\r\n" +
+                $"FreezableCollection aquarium2 contains {aquarium2.AquariumContents.Count} fish");
         }
 
         //<FreezableCollectionAquarium>
@@ -126,11 +127,10 @@ public class Aquarium : DependencyObject
             // Set the default collection value in a class constructor.
             public Aquarium() => SetValue(s_aquariumContentsPropertyKey, new FreezableCollection<FrameworkElement>());
 
-            // Declare a read-only property.
+            // Declare a public get accessor.
             public FreezableCollection<FrameworkElement> AquariumContents =>
                 (FreezableCollection<FrameworkElement>)GetValue(AquariumContentsProperty);
         }
-
         //</FreezableCollectionAquarium>
 
         public class Fish : FrameworkElement { }
diff --git a/dotnet-desktop-guide/net/wpf/properties/snippets/collection-type-dependency-properties/vb/CodeSampleVb.vbproj b/dotnet-desktop-guide/net/wpf/properties/snippets/collection-type-dependency-properties/vb/CodeSampleVb.vbproj
index c7ae1cc7ce..34db9b0460 100644
--- a/dotnet-desktop-guide/net/wpf/properties/snippets/collection-type-dependency-properties/vb/CodeSampleVb.vbproj
+++ b/dotnet-desktop-guide/net/wpf/properties/snippets/collection-type-dependency-properties/vb/CodeSampleVb.vbproj
@@ -2,7 +2,7 @@
 
   <PropertyGroup>
     <OutputType>WinExe</OutputType>
-    <TargetFramework>net5.0-windows</TargetFramework>
+    <TargetFramework>net6.0-windows</TargetFramework>
     <RootNamespace>CodeSampleVb</RootNamespace>
     <UseWPF>true</UseWPF>
   </PropertyGroup>
diff --git a/dotnet-desktop-guide/net/wpf/properties/snippets/collection-type-dependency-properties/vb/MainWindow.xaml b/dotnet-desktop-guide/net/wpf/properties/snippets/collection-type-dependency-properties/vb/MainWindow.xaml
index 2080a2ff3d..0cf6a980b9 100644
--- a/dotnet-desktop-guide/net/wpf/properties/snippets/collection-type-dependency-properties/vb/MainWindow.xaml
+++ b/dotnet-desktop-guide/net/wpf/properties/snippets/collection-type-dependency-properties/vb/MainWindow.xaml
@@ -1,11 +1,12 @@
 <Window x:Class="CodeSampleVb.MainWindow"
     xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
-    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" xmlns:src="clr-namespace:CodeSampleCsharp"
-        Title="Collection-Type Dependency Properties" Height="100" Width="400">
+    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
+        Title="Collection-Type Dependency Properties" Height="100" Width="500">
 
     <StackPanel>
 
-        <Button Click="InitializeAquariums">Set collection default value in class constructor</Button>
+        <Button Click="InitializeAquariums">Set collection default value in class constructor (Aquarium)</Button>
+        <Button Click="InitializeFreezableAquariums">Set collection default value in class constructor (FreezableCollection Aquarium)</Button>
 
     </StackPanel>
 </Window>
diff --git a/dotnet-desktop-guide/net/wpf/properties/snippets/collection-type-dependency-properties/vb/MainWindow.xaml.vb b/dotnet-desktop-guide/net/wpf/properties/snippets/collection-type-dependency-properties/vb/MainWindow.xaml.vb
index 4743b19436..7fc8f23188 100644
--- a/dotnet-desktop-guide/net/wpf/properties/snippets/collection-type-dependency-properties/vb/MainWindow.xaml.vb
+++ b/dotnet-desktop-guide/net/wpf/properties/snippets/collection-type-dependency-properties/vb/MainWindow.xaml.vb
@@ -16,11 +16,15 @@
             Dim aquarium2 As New Aquarium()
             aquarium1.AquariumContents.Add(New Fish())
             aquarium2.AquariumContents.Add(New Fish())
-            MessageBox.Show($"Aquarium1 contains {aquarium1.AquariumContents.Count} fish{Environment.NewLine}" +
-                            $"Aquarium2 contains {aquarium2.AquariumContents.Count} fish")
+            MessageBox.Show($"aquarium1 contains {aquarium1.AquariumContents.Count} fish{Environment.NewLine}" +
+                            $"aquarium2 contains {aquarium2.AquariumContents.Count} fish")
         End Sub
         '</InitializeAquariums>
 
+        Private Sub InitializeFreezableAquariums(sender As Object, e As RoutedEventArgs)
+            FreezableCollectionAquarium.InitializeAquariums()
+        End Sub
+
     End Class
 
     '<SetCollectionDefaultValueInConstructor>
@@ -37,19 +41,15 @@
                 typeMetadata:=New FrameworkPropertyMetadata())
                 'typeMetadata:=New FrameworkPropertyMetadata(New List(Of FrameworkElement)))
 
-        ' Store the dependency property identifier as a static member of the class.
-        Public Shared ReadOnly AquariumContentsProperty As DependencyProperty =
-            s_aquariumContentsPropertyKey.DependencyProperty
-
         ' Set the default collection value in a class constructor.
         Public Sub New()
             SetValue(s_aquariumContentsPropertyKey, New List(Of FrameworkElement)())
         End Sub
 
-        ' Declare a read-only property.
+        ' Declare a public get accessor.
         Public ReadOnly Property AquariumContents As List(Of FrameworkElement)
             Get
-                Return CType(GetValue(AquariumContentsProperty), List(Of FrameworkElement))
+                Return CType(GetValue(s_aquariumContentsPropertyKey.DependencyProperty), List(Of FrameworkElement))
             End Get
         End Property
     End Class
@@ -67,8 +67,8 @@
             aquarium1.AquariumContents.Add(New Fish())
             aquarium2.AquariumContents.Add(New Fish())
             aquarium2.AquariumContents = New List(Of FrameworkElement)()
-            MessageBox.Show($"Aquarium1 contains {aquarium1.AquariumContents.Count} fish{Environment.NewLine}" +
-                            $"Aquarium2 contains {aquarium2.AquariumContents.Count} fish")
+            MessageBox.Show($"aquarium1 contains {aquarium1.AquariumContents.Count} fish{Environment.NewLine}" +
+                            $"aquarium2 contains {aquarium2.AquariumContents.Count} fish")
         End Sub
 
         '<ReadWriteDependencyProperty>
@@ -89,7 +89,7 @@
                 SetValue(AquariumContentsProperty, New List(Of FrameworkElement)())
             End Sub
 
-            ' Declare a read-write property.
+            ' Declare public get and set accessors.
             Public Property AquariumContents As List(Of FrameworkElement)
                 Get
                     Return CType(GetValue(AquariumContentsProperty), List(Of FrameworkElement))
@@ -114,8 +114,8 @@
             Dim aquarium2 As New Aquarium()
             aquarium1.AquariumContents.Add(New Fish())
             aquarium2.AquariumContents.Add(New Fish())
-            MessageBox.Show($"Aquarium1 contains {aquarium1.AquariumContents.Count} fish{Environment.NewLine}" +
-                            $"Aquarium2 contains {aquarium2.AquariumContents.Count} fish")
+            MessageBox.Show($"FreezableCollection aquarium1 contains {aquarium1.AquariumContents.Count} fish{Environment.NewLine}" +
+                            $"FreezableCollection aquarium2 contains {aquarium2.AquariumContents.Count} fish")
         End Sub
 
         '<FreezableCollectionAquarium>
@@ -131,19 +131,15 @@
                     ownerType:=GetType(Aquarium),
                     typeMetadata:=New FrameworkPropertyMetadata())
 
-            ' Store the dependency property identifier as a static member of the class.
-            Public Shared ReadOnly AquariumContentsProperty As DependencyProperty =
-                s_aquariumContentsPropertyKey.DependencyProperty
-
             ' Set the default collection value in a class constructor.
             Public Sub New()
                 SetValue(s_aquariumContentsPropertyKey, New FreezableCollection(Of FrameworkElement)())
             End Sub
 
-            ' Declare a read-only property.
+            ' Declare a public get accessor.
             Public ReadOnly Property AquariumContents As FreezableCollection(Of FrameworkElement)
                 Get
-                    Return CType(GetValue(AquariumContentsProperty), FreezableCollection(Of FrameworkElement))
+                    Return CType(GetValue(s_aquariumContentsPropertyKey.DependencyProperty), FreezableCollection(Of FrameworkElement))
                 End Get
             End Property
         End Class
diff --git a/dotnet-desktop-guide/net/wpf/properties/snippets/custom-dependency-properties/csharp/CodeSampleCsharp.csproj b/dotnet-desktop-guide/net/wpf/properties/snippets/custom-dependency-properties/csharp/CodeSampleCsharp.csproj
index 8824b2f16a..22d78ee6d6 100644
--- a/dotnet-desktop-guide/net/wpf/properties/snippets/custom-dependency-properties/csharp/CodeSampleCsharp.csproj
+++ b/dotnet-desktop-guide/net/wpf/properties/snippets/custom-dependency-properties/csharp/CodeSampleCsharp.csproj
@@ -2,7 +2,7 @@
 
   <PropertyGroup>
     <OutputType>WinExe</OutputType>
-    <TargetFramework>net5.0-windows</TargetFramework>
+    <TargetFramework>net6.0-windows</TargetFramework>
     <UseWPF>true</UseWPF>
   </PropertyGroup>
 
diff --git a/dotnet-desktop-guide/net/wpf/properties/snippets/custom-dependency-properties/vb/CodeSampleVb.vbproj b/dotnet-desktop-guide/net/wpf/properties/snippets/custom-dependency-properties/vb/CodeSampleVb.vbproj
index c7ae1cc7ce..34db9b0460 100644
--- a/dotnet-desktop-guide/net/wpf/properties/snippets/custom-dependency-properties/vb/CodeSampleVb.vbproj
+++ b/dotnet-desktop-guide/net/wpf/properties/snippets/custom-dependency-properties/vb/CodeSampleVb.vbproj
@@ -2,7 +2,7 @@
 
   <PropertyGroup>
     <OutputType>WinExe</OutputType>
-    <TargetFramework>net5.0-windows</TargetFramework>
+    <TargetFramework>net6.0-windows</TargetFramework>
     <RootNamespace>CodeSampleVb</RootNamespace>
     <UseWPF>true</UseWPF>
   </PropertyGroup>
diff --git a/dotnet-desktop-guide/net/wpf/properties/snippets/dependency-properties-overview/csharp/CodeSampleCsharp.csproj b/dotnet-desktop-guide/net/wpf/properties/snippets/dependency-properties-overview/csharp/CodeSampleCsharp.csproj
index 4d6d00fe45..40cc4c9e31 100644
--- a/dotnet-desktop-guide/net/wpf/properties/snippets/dependency-properties-overview/csharp/CodeSampleCsharp.csproj
+++ b/dotnet-desktop-guide/net/wpf/properties/snippets/dependency-properties-overview/csharp/CodeSampleCsharp.csproj
@@ -2,7 +2,7 @@
 
   <PropertyGroup>
     <OutputType>WinExe</OutputType>
-    <TargetFramework>net5.0-windows</TargetFramework>
+    <TargetFramework>net6.0-windows</TargetFramework>
     <UseWPF>true</UseWPF>
   </PropertyGroup>
 
diff --git a/dotnet-desktop-guide/net/wpf/properties/snippets/dependency-properties-overview/vb/CodeSampleVb.vbproj b/dotnet-desktop-guide/net/wpf/properties/snippets/dependency-properties-overview/vb/CodeSampleVb.vbproj
index f2895f87b1..ddcaa093e0 100644
--- a/dotnet-desktop-guide/net/wpf/properties/snippets/dependency-properties-overview/vb/CodeSampleVb.vbproj
+++ b/dotnet-desktop-guide/net/wpf/properties/snippets/dependency-properties-overview/vb/CodeSampleVb.vbproj
@@ -2,7 +2,7 @@
 
   <PropertyGroup>
     <OutputType>WinExe</OutputType>
-    <TargetFramework>net5.0-windows</TargetFramework>
+    <TargetFramework>net6.0-windows</TargetFramework>
     <RootNamespace>CodeSampleVb</RootNamespace>
     <UseWPF>true</UseWPF>
   </PropertyGroup>
diff --git a/dotnet-desktop-guide/net/wpf/properties/snippets/dependency-property-callbacks-and-validation/csharp/CodeSampleCsharp.csproj b/dotnet-desktop-guide/net/wpf/properties/snippets/dependency-property-callbacks-and-validation/csharp/CodeSampleCsharp.csproj
index 8824b2f16a..22d78ee6d6 100644
--- a/dotnet-desktop-guide/net/wpf/properties/snippets/dependency-property-callbacks-and-validation/csharp/CodeSampleCsharp.csproj
+++ b/dotnet-desktop-guide/net/wpf/properties/snippets/dependency-property-callbacks-and-validation/csharp/CodeSampleCsharp.csproj
@@ -2,7 +2,7 @@
 
   <PropertyGroup>
     <OutputType>WinExe</OutputType>
-    <TargetFramework>net5.0-windows</TargetFramework>
+    <TargetFramework>net6.0-windows</TargetFramework>
     <UseWPF>true</UseWPF>
   </PropertyGroup>
 
diff --git a/dotnet-desktop-guide/net/wpf/properties/snippets/dependency-property-callbacks-and-validation/vb/CodeSampleVb.vbproj b/dotnet-desktop-guide/net/wpf/properties/snippets/dependency-property-callbacks-and-validation/vb/CodeSampleVb.vbproj
index c7ae1cc7ce..34db9b0460 100644
--- a/dotnet-desktop-guide/net/wpf/properties/snippets/dependency-property-callbacks-and-validation/vb/CodeSampleVb.vbproj
+++ b/dotnet-desktop-guide/net/wpf/properties/snippets/dependency-property-callbacks-and-validation/vb/CodeSampleVb.vbproj
@@ -2,7 +2,7 @@
 
   <PropertyGroup>
     <OutputType>WinExe</OutputType>
-    <TargetFramework>net5.0-windows</TargetFramework>
+    <TargetFramework>net6.0-windows</TargetFramework>
     <RootNamespace>CodeSampleVb</RootNamespace>
     <UseWPF>true</UseWPF>
   </PropertyGroup>
diff --git a/dotnet-desktop-guide/net/wpf/properties/snippets/dependency-property-value-precedence/csharp/CodeSampleCsharp.csproj b/dotnet-desktop-guide/net/wpf/properties/snippets/dependency-property-value-precedence/csharp/CodeSampleCsharp.csproj
index 8824b2f16a..22d78ee6d6 100644
--- a/dotnet-desktop-guide/net/wpf/properties/snippets/dependency-property-value-precedence/csharp/CodeSampleCsharp.csproj
+++ b/dotnet-desktop-guide/net/wpf/properties/snippets/dependency-property-value-precedence/csharp/CodeSampleCsharp.csproj
@@ -2,7 +2,7 @@
 
   <PropertyGroup>
     <OutputType>WinExe</OutputType>
-    <TargetFramework>net5.0-windows</TargetFramework>
+    <TargetFramework>net6.0-windows</TargetFramework>
     <UseWPF>true</UseWPF>
   </PropertyGroup>
 
diff --git a/dotnet-desktop-guide/net/wpf/properties/snippets/how-to-implement-a-dependency-property/csharp/CodeSampleCsharp.csproj b/dotnet-desktop-guide/net/wpf/properties/snippets/how-to-implement-a-dependency-property/csharp/CodeSampleCsharp.csproj
index 8824b2f16a..22d78ee6d6 100644
--- a/dotnet-desktop-guide/net/wpf/properties/snippets/how-to-implement-a-dependency-property/csharp/CodeSampleCsharp.csproj
+++ b/dotnet-desktop-guide/net/wpf/properties/snippets/how-to-implement-a-dependency-property/csharp/CodeSampleCsharp.csproj
@@ -2,7 +2,7 @@
 
   <PropertyGroup>
     <OutputType>WinExe</OutputType>
-    <TargetFramework>net5.0-windows</TargetFramework>
+    <TargetFramework>net6.0-windows</TargetFramework>
     <UseWPF>true</UseWPF>
   </PropertyGroup>
 
diff --git a/dotnet-desktop-guide/net/wpf/properties/snippets/how-to-implement-a-dependency-property/vb/CodeSampleVb.vbproj b/dotnet-desktop-guide/net/wpf/properties/snippets/how-to-implement-a-dependency-property/vb/CodeSampleVb.vbproj
index c7ae1cc7ce..34db9b0460 100644
--- a/dotnet-desktop-guide/net/wpf/properties/snippets/how-to-implement-a-dependency-property/vb/CodeSampleVb.vbproj
+++ b/dotnet-desktop-guide/net/wpf/properties/snippets/how-to-implement-a-dependency-property/vb/CodeSampleVb.vbproj
@@ -2,7 +2,7 @@
 
   <PropertyGroup>
     <OutputType>WinExe</OutputType>
-    <TargetFramework>net5.0-windows</TargetFramework>
+    <TargetFramework>net6.0-windows</TargetFramework>
     <RootNamespace>CodeSampleVb</RootNamespace>
     <UseWPF>true</UseWPF>
   </PropertyGroup>
diff --git a/dotnet-desktop-guide/net/wpf/properties/snippets/how-to-override-metadata-for-a-dependency-property/csharp/CodeSampleCsharp.csproj b/dotnet-desktop-guide/net/wpf/properties/snippets/how-to-override-metadata-for-a-dependency-property/csharp/CodeSampleCsharp.csproj
index 8824b2f16a..22d78ee6d6 100644
--- a/dotnet-desktop-guide/net/wpf/properties/snippets/how-to-override-metadata-for-a-dependency-property/csharp/CodeSampleCsharp.csproj
+++ b/dotnet-desktop-guide/net/wpf/properties/snippets/how-to-override-metadata-for-a-dependency-property/csharp/CodeSampleCsharp.csproj
@@ -2,7 +2,7 @@
 
   <PropertyGroup>
     <OutputType>WinExe</OutputType>
-    <TargetFramework>net5.0-windows</TargetFramework>
+    <TargetFramework>net6.0-windows</TargetFramework>
     <UseWPF>true</UseWPF>
   </PropertyGroup>
 
diff --git a/dotnet-desktop-guide/net/wpf/properties/snippets/how-to-override-metadata-for-a-dependency-property/vb/CodeSampleVb.vbproj b/dotnet-desktop-guide/net/wpf/properties/snippets/how-to-override-metadata-for-a-dependency-property/vb/CodeSampleVb.vbproj
index c7ae1cc7ce..34db9b0460 100644
--- a/dotnet-desktop-guide/net/wpf/properties/snippets/how-to-override-metadata-for-a-dependency-property/vb/CodeSampleVb.vbproj
+++ b/dotnet-desktop-guide/net/wpf/properties/snippets/how-to-override-metadata-for-a-dependency-property/vb/CodeSampleVb.vbproj
@@ -2,7 +2,7 @@
 
   <PropertyGroup>
     <OutputType>WinExe</OutputType>
-    <TargetFramework>net5.0-windows</TargetFramework>
+    <TargetFramework>net6.0-windows</TargetFramework>
     <RootNamespace>CodeSampleVb</RootNamespace>
     <UseWPF>true</UseWPF>
   </PropertyGroup>
diff --git a/dotnet-desktop-guide/net/wpf/properties/snippets/how-to-register-an-attached-property/csharp/CodeSampleCsharp.csproj b/dotnet-desktop-guide/net/wpf/properties/snippets/how-to-register-an-attached-property/csharp/CodeSampleCsharp.csproj
index 8824b2f16a..22d78ee6d6 100644
--- a/dotnet-desktop-guide/net/wpf/properties/snippets/how-to-register-an-attached-property/csharp/CodeSampleCsharp.csproj
+++ b/dotnet-desktop-guide/net/wpf/properties/snippets/how-to-register-an-attached-property/csharp/CodeSampleCsharp.csproj
@@ -2,7 +2,7 @@
 
   <PropertyGroup>
     <OutputType>WinExe</OutputType>
-    <TargetFramework>net5.0-windows</TargetFramework>
+    <TargetFramework>net6.0-windows</TargetFramework>
     <UseWPF>true</UseWPF>
   </PropertyGroup>
 
diff --git a/dotnet-desktop-guide/net/wpf/properties/snippets/how-to-register-an-attached-property/vb/CodeSampleVb.vbproj b/dotnet-desktop-guide/net/wpf/properties/snippets/how-to-register-an-attached-property/vb/CodeSampleVb.vbproj
index c7ae1cc7ce..34db9b0460 100644
--- a/dotnet-desktop-guide/net/wpf/properties/snippets/how-to-register-an-attached-property/vb/CodeSampleVb.vbproj
+++ b/dotnet-desktop-guide/net/wpf/properties/snippets/how-to-register-an-attached-property/vb/CodeSampleVb.vbproj
@@ -2,7 +2,7 @@
 
   <PropertyGroup>
     <OutputType>WinExe</OutputType>
-    <TargetFramework>net5.0-windows</TargetFramework>
+    <TargetFramework>net6.0-windows</TargetFramework>
     <RootNamespace>CodeSampleVb</RootNamespace>
     <UseWPF>true</UseWPF>
   </PropertyGroup>
diff --git a/dotnet-desktop-guide/net/wpf/properties/snippets/read-only-dependency-properties/csharp/App.xaml.cs b/dotnet-desktop-guide/net/wpf/properties/snippets/read-only-dependency-properties/csharp/App.xaml.cs
new file mode 100644
index 0000000000..31285520b3
--- /dev/null
+++ b/dotnet-desktop-guide/net/wpf/properties/snippets/read-only-dependency-properties/csharp/App.xaml.cs
@@ -0,0 +1,17 @@
+using System;
+using System.Collections.Generic;
+using System.Configuration;
+using System.Data;
+using System.Linq;
+using System.Threading.Tasks;
+using System.Windows;
+
+namespace CodeSampleCsharp
+{
+    /// <summary>
+    /// Interaction logic for App.xaml
+    /// </summary>
+    public partial class App : Application
+    {
+    }
+}
diff --git a/dotnet-desktop-guide/net/wpf/properties/snippets/read-only-dependency-properties/csharp/AssemblyInfo.cs b/dotnet-desktop-guide/net/wpf/properties/snippets/read-only-dependency-properties/csharp/AssemblyInfo.cs
new file mode 100644
index 0000000000..8b5504ecfb
--- /dev/null
+++ b/dotnet-desktop-guide/net/wpf/properties/snippets/read-only-dependency-properties/csharp/AssemblyInfo.cs
@@ -0,0 +1,10 @@
+using System.Windows;
+
+[assembly: ThemeInfo(
+    ResourceDictionaryLocation.None, //where theme specific resource dictionaries are located
+                                     //(used if a resource is not found in the page,
+                                     // or application resource dictionaries)
+    ResourceDictionaryLocation.SourceAssembly //where the generic resource dictionary is located
+                                              //(used if a resource is not found in the page,
+                                              // app, or any theme specific resource dictionaries)
+)]
diff --git a/dotnet-desktop-guide/net/wpf/properties/snippets/read-only-dependency-properties/csharp/CodeSampleCsharp.csproj b/dotnet-desktop-guide/net/wpf/properties/snippets/read-only-dependency-properties/csharp/CodeSampleCsharp.csproj
new file mode 100644
index 0000000000..22d78ee6d6
--- /dev/null
+++ b/dotnet-desktop-guide/net/wpf/properties/snippets/read-only-dependency-properties/csharp/CodeSampleCsharp.csproj
@@ -0,0 +1,24 @@
+<Project Sdk="Microsoft.NET.Sdk">
+
+  <PropertyGroup>
+    <OutputType>WinExe</OutputType>
+    <TargetFramework>net6.0-windows</TargetFramework>
+    <UseWPF>true</UseWPF>
+  </PropertyGroup>
+
+  <ItemGroup>
+    <Compile Update="Properties\Resources.Designer.cs">
+      <DesignTime>True</DesignTime>
+      <AutoGen>True</AutoGen>
+      <DependentUpon>Resources.resx</DependentUpon>
+    </Compile>
+  </ItemGroup>
+
+  <ItemGroup>
+    <EmbeddedResource Update="Properties\Resources.resx">
+      <Generator>ResXFileCodeGenerator</Generator>
+      <LastGenOutput>Resources.Designer.cs</LastGenOutput>
+    </EmbeddedResource>
+  </ItemGroup>
+
+</Project>
diff --git a/dotnet-desktop-guide/net/wpf/properties/snippets/read-only-dependency-properties/csharp/MainWindow.xaml b/dotnet-desktop-guide/net/wpf/properties/snippets/read-only-dependency-properties/csharp/MainWindow.xaml
new file mode 100644
index 0000000000..0c1f59a68d
--- /dev/null
+++ b/dotnet-desktop-guide/net/wpf/properties/snippets/read-only-dependency-properties/csharp/MainWindow.xaml
@@ -0,0 +1,12 @@
+<Window x:Class="CodeSampleCsharp.MainWindow"
+    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
+    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
+        Title="Readonly dependency properties" Height="100" Width="400">
+
+    <StackPanel>
+
+        <Button Click="Button_Click">Increment property value</Button>
+        <Label Name="lblFishCount" Content="Aquarium fish count: 0"/>
+
+    </StackPanel>
+</Window>
diff --git a/dotnet-desktop-guide/net/wpf/properties/snippets/read-only-dependency-properties/csharp/MainWindow.xaml.cs b/dotnet-desktop-guide/net/wpf/properties/snippets/read-only-dependency-properties/csharp/MainWindow.xaml.cs
new file mode 100644
index 0000000000..2edcbde195
--- /dev/null
+++ b/dotnet-desktop-guide/net/wpf/properties/snippets/read-only-dependency-properties/csharp/MainWindow.xaml.cs
@@ -0,0 +1,38 @@
+using System.Windows;
+
+namespace CodeSampleCsharp
+{
+    /// <summary>
+    /// Interaction logic for MainWindow.xaml.
+    /// </summary>
+    public partial class MainWindow : Window
+    {
+        readonly Aquarium _aquarium = new();
+
+        private void Button_Click(object sender, RoutedEventArgs e)
+        {
+            // Test setting a value.
+            _aquarium.SetValue(Aquarium.FishCountPropertyKey, _aquarium.FishCount + 1);
+            lblFishCount.Content = $"Aquarium fish count: {_aquarium.FishCount}";
+        }
+    }
+
+    //<RegisterReadOnlyDependencyProperty>
+    public class Aquarium : DependencyObject
+    {
+        // Register a dependency property with the specified property name,
+        // property type, owner type, and property metadata.
+        // Assign DependencyPropertyKey to a nonpublic field.
+        internal static readonly DependencyPropertyKey FishCountPropertyKey =
+            DependencyProperty.RegisterReadOnly(
+              name: "FishCount",
+              propertyType: typeof(int),
+              ownerType: typeof(Aquarium),
+              typeMetadata: new FrameworkPropertyMetadata());
+
+        // Declare a public get accessor.
+        public int FishCount =>
+            (int)GetValue(FishCountPropertyKey.DependencyProperty);
+    }
+    //</RegisterReadOnlyDependencyProperty>
+}
diff --git a/dotnet-desktop-guide/net/wpf/properties/snippets/read-only-dependency-properties/csharp/Properties/Resources.Designer.cs b/dotnet-desktop-guide/net/wpf/properties/snippets/read-only-dependency-properties/csharp/Properties/Resources.Designer.cs
new file mode 100644
index 0000000000..64552f96fd
--- /dev/null
+++ b/dotnet-desktop-guide/net/wpf/properties/snippets/read-only-dependency-properties/csharp/Properties/Resources.Designer.cs
@@ -0,0 +1,63 @@
+//------------------------------------------------------------------------------
+// <auto-generated>
+//     This code was generated by a tool.
+//     Runtime Version:4.0.30319.42000
+//
+//     Changes to this file may cause incorrect behavior and will be lost if
+//     the code is regenerated.
+// </auto-generated>
+//------------------------------------------------------------------------------
+
+namespace CodeSampleCsharp.Properties {
+    using System;
+    
+    
+    /// <summary>
+    ///   A strongly-typed resource class, for looking up localized strings, etc.
+    /// </summary>
+    // This class was auto-generated by the StronglyTypedResourceBuilder
+    // class via a tool like ResGen or Visual Studio.
+    // To add or remove a member, edit your .ResX file then rerun ResGen
+    // with the /str option, or rebuild your VS project.
+    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("System.Resources.Tools.StronglyTypedResourceBuilder", "16.0.0.0")]
+    [global::System.Diagnostics.DebuggerNonUserCodeAttribute()]
+    [global::System.Runtime.CompilerServices.CompilerGeneratedAttribute()]
+    internal class Resources {
+        
+        private static global::System.Resources.ResourceManager resourceMan;
+        
+        private static global::System.Globalization.CultureInfo resourceCulture;
+        
+        [global::System.Diagnostics.CodeAnalysis.SuppressMessageAttribute("Microsoft.Performance", "CA1811:AvoidUncalledPrivateCode")]
+        internal Resources() {
+        }
+        
+        /// <summary>
+        ///   Returns the cached ResourceManager instance used by this class.
+        /// </summary>
+        [global::System.ComponentModel.EditorBrowsableAttribute(global::System.ComponentModel.EditorBrowsableState.Advanced)]
+        internal static global::System.Resources.ResourceManager ResourceManager {
+            get {
+                if (object.ReferenceEquals(resourceMan, null)) {
+                    global::System.Resources.ResourceManager temp = new global::System.Resources.ResourceManager("CodeSampleCsharp.Properties.Resources", typeof(Resources).Assembly);
+                    resourceMan = temp;
+                }
+                return resourceMan;
+            }
+        }
+        
+        /// <summary>
+        ///   Overrides the current thread's CurrentUICulture property for all
+        ///   resource lookups using this strongly typed resource class.
+        /// </summary>
+        [global::System.ComponentModel.EditorBrowsableAttribute(global::System.ComponentModel.EditorBrowsableState.Advanced)]
+        internal static global::System.Globalization.CultureInfo Culture {
+            get {
+                return resourceCulture;
+            }
+            set {
+                resourceCulture = value;
+            }
+        }
+    }
+}
diff --git a/dotnet-desktop-guide/net/wpf/properties/snippets/read-only-dependency-properties/csharp/Properties/Resources.resx b/dotnet-desktop-guide/net/wpf/properties/snippets/read-only-dependency-properties/csharp/Properties/Resources.resx
new file mode 100644
index 0000000000..1af7de150c
--- /dev/null
+++ b/dotnet-desktop-guide/net/wpf/properties/snippets/read-only-dependency-properties/csharp/Properties/Resources.resx
@@ -0,0 +1,120 @@
+<?xml version="1.0" encoding="utf-8"?>
+<root>
+  <!-- 
+    Microsoft ResX Schema 
+    
+    Version 2.0
+    
+    The primary goals of this format is to allow a simple XML format 
+    that is mostly human readable. The generation and parsing of the 
+    various data types are done through the TypeConverter classes 
+    associated with the data types.
+    
+    Example:
+    
+    ... ado.net/XML headers & schema ...
+    <resheader name="resmimetype">text/microsoft-resx</resheader>
+    <resheader name="version">2.0</resheader>
+    <resheader name="reader">System.Resources.ResXResourceReader, System.Windows.Forms, ...</resheader>
+    <resheader name="writer">System.Resources.ResXResourceWriter, System.Windows.Forms, ...</resheader>
+    <data name="Name1"><value>this is my long string</value><comment>this is a comment</comment></data>
+    <data name="Color1" type="System.Drawing.Color, System.Drawing">Blue</data>
+    <data name="Bitmap1" mimetype="application/x-microsoft.net.object.binary.base64">
+        <value>[base64 mime encoded serialized .NET Framework object]</value>
+    </data>
+    <data name="Icon1" type="System.Drawing.Icon, System.Drawing" mimetype="application/x-microsoft.net.object.bytearray.base64">
+        <value>[base64 mime encoded string representing a byte array form of the .NET Framework object]</value>
+        <comment>This is a comment</comment>
+    </data>
+                
+    There are any number of "resheader" rows that contain simple 
+    name/value pairs.
+    
+    Each data row contains a name, and value. The row also contains a 
+    type or mimetype. Type corresponds to a .NET class that support 
+    text/value conversion through the TypeConverter architecture. 
+    Classes that don't support this are serialized and stored with the 
+    mimetype set.
+    
+    The mimetype is used for serialized objects, and tells the 
+    ResXResourceReader how to depersist the object. This is currently not 
+    extensible. For a given mimetype the value must be set accordingly:
+    
+    Note - application/x-microsoft.net.object.binary.base64 is the format 
+    that the ResXResourceWriter will generate, however the reader can 
+    read any of the formats listed below.
+    
+    mimetype: application/x-microsoft.net.object.binary.base64
+    value   : The object must be serialized with 
+            : System.Runtime.Serialization.Formatters.Binary.BinaryFormatter
+            : and then encoded with base64 encoding.
+    
+    mimetype: application/x-microsoft.net.object.soap.base64
+    value   : The object must be serialized with 
+            : System.Runtime.Serialization.Formatters.Soap.SoapFormatter
+            : and then encoded with base64 encoding.
+
+    mimetype: application/x-microsoft.net.object.bytearray.base64
+    value   : The object must be serialized into a byte array 
+            : using a System.ComponentModel.TypeConverter
+            : and then encoded with base64 encoding.
+    -->
+  <xsd:schema id="root" xmlns="" xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns:msdata="urn:schemas-microsoft-com:xml-msdata">
+    <xsd:import namespace="http://www.w3.org/XML/1998/namespace" />
+    <xsd:element name="root" msdata:IsDataSet="true">
+      <xsd:complexType>
+        <xsd:choice maxOccurs="unbounded">
+          <xsd:element name="metadata">
+            <xsd:complexType>
+              <xsd:sequence>
+                <xsd:element name="value" type="xsd:string" minOccurs="0" />
+              </xsd:sequence>
+              <xsd:attribute name="name" use="required" type="xsd:string" />
+              <xsd:attribute name="type" type="xsd:string" />
+              <xsd:attribute name="mimetype" type="xsd:string" />
+              <xsd:attribute ref="xml:space" />
+            </xsd:complexType>
+          </xsd:element>
+          <xsd:element name="assembly">
+            <xsd:complexType>
+              <xsd:attribute name="alias" type="xsd:string" />
+              <xsd:attribute name="name" type="xsd:string" />
+            </xsd:complexType>
+          </xsd:element>
+          <xsd:element name="data">
+            <xsd:complexType>
+              <xsd:sequence>
+                <xsd:element name="value" type="xsd:string" minOccurs="0" msdata:Ordinal="1" />
+                <xsd:element name="comment" type="xsd:string" minOccurs="0" msdata:Ordinal="2" />
+              </xsd:sequence>
+              <xsd:attribute name="name" type="xsd:string" use="required" msdata:Ordinal="1" />
+              <xsd:attribute name="type" type="xsd:string" msdata:Ordinal="3" />
+              <xsd:attribute name="mimetype" type="xsd:string" msdata:Ordinal="4" />
+              <xsd:attribute ref="xml:space" />
+            </xsd:complexType>
+          </xsd:element>
+          <xsd:element name="resheader">
+            <xsd:complexType>
+              <xsd:sequence>
+                <xsd:element name="value" type="xsd:string" minOccurs="0" msdata:Ordinal="1" />
+              </xsd:sequence>
+              <xsd:attribute name="name" type="xsd:string" use="required" />
+            </xsd:complexType>
+          </xsd:element>
+        </xsd:choice>
+      </xsd:complexType>
+    </xsd:element>
+  </xsd:schema>
+  <resheader name="resmimetype">
+    <value>text/microsoft-resx</value>
+  </resheader>
+  <resheader name="version">
+    <value>2.0</value>
+  </resheader>
+  <resheader name="reader">
+    <value>System.Resources.ResXResourceReader, System.Windows.Forms, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089</value>
+  </resheader>
+  <resheader name="writer">
+    <value>System.Resources.ResXResourceWriter, System.Windows.Forms, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089</value>
+  </resheader>
+</root>
\ No newline at end of file
diff --git a/dotnet-desktop-guide/net/wpf/properties/snippets/read-only-dependency-properties/csharp/app.xaml b/dotnet-desktop-guide/net/wpf/properties/snippets/read-only-dependency-properties/csharp/app.xaml
new file mode 100644
index 0000000000..867d2f015f
--- /dev/null
+++ b/dotnet-desktop-guide/net/wpf/properties/snippets/read-only-dependency-properties/csharp/app.xaml
@@ -0,0 +1,9 @@
+<Application x:Class="CodeSampleCsharp.App"
+             xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
+             xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
+             xmlns:local="clr-namespace:CodeSampleCsharp"
+             StartupUri="MainWindow.xaml">
+    <Application.Resources>
+         
+    </Application.Resources>
+</Application>
diff --git a/dotnet-desktop-guide/net/wpf/properties/snippets/read-only-dependency-properties/vb/Application.xaml b/dotnet-desktop-guide/net/wpf/properties/snippets/read-only-dependency-properties/vb/Application.xaml
new file mode 100644
index 0000000000..f225972592
--- /dev/null
+++ b/dotnet-desktop-guide/net/wpf/properties/snippets/read-only-dependency-properties/vb/Application.xaml
@@ -0,0 +1,9 @@
+<Application x:Class="Application"
+             xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
+             xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
+             xmlns:local="clr-namespace:CodeSampleVb"
+             StartupUri="MainWindow.xaml">
+    <Application.Resources>
+         
+    </Application.Resources>
+</Application>
diff --git a/dotnet-desktop-guide/net/wpf/properties/snippets/read-only-dependency-properties/vb/Application.xaml.vb b/dotnet-desktop-guide/net/wpf/properties/snippets/read-only-dependency-properties/vb/Application.xaml.vb
new file mode 100644
index 0000000000..084cbe917e
--- /dev/null
+++ b/dotnet-desktop-guide/net/wpf/properties/snippets/read-only-dependency-properties/vb/Application.xaml.vb
@@ -0,0 +1,6 @@
+Class Application
+
+    ' Application-level events, such as Startup, Exit, and DispatcherUnhandledException
+    ' can be handled in this file.
+
+End Class
diff --git a/dotnet-desktop-guide/net/wpf/properties/snippets/read-only-dependency-properties/vb/AssemblyInfo.vb b/dotnet-desktop-guide/net/wpf/properties/snippets/read-only-dependency-properties/vb/AssemblyInfo.vb
new file mode 100644
index 0000000000..025ee7271e
--- /dev/null
+++ b/dotnet-desktop-guide/net/wpf/properties/snippets/read-only-dependency-properties/vb/AssemblyInfo.vb
@@ -0,0 +1,11 @@
+Imports System.Windows
+
+'The ThemeInfo attribute describes where any theme specific and generic resource dictionaries can be found.
+'1st parameter: where theme specific resource dictionaries are located
+'(used if a resource is not found in the page,
+' or application resource dictionaries)
+
+'2nd parameter: where the generic resource dictionary is located
+'(used if a resource is not found in the page,
+'app, and any theme specific resource dictionaries)
+<Assembly: ThemeInfo(ResourceDictionaryLocation.None, ResourceDictionaryLocation.SourceAssembly)>
diff --git a/dotnet-desktop-guide/net/wpf/properties/snippets/read-only-dependency-properties/vb/CodeSampleVb.vbproj b/dotnet-desktop-guide/net/wpf/properties/snippets/read-only-dependency-properties/vb/CodeSampleVb.vbproj
new file mode 100644
index 0000000000..34db9b0460
--- /dev/null
+++ b/dotnet-desktop-guide/net/wpf/properties/snippets/read-only-dependency-properties/vb/CodeSampleVb.vbproj
@@ -0,0 +1,22 @@
+<Project Sdk="Microsoft.NET.Sdk">
+
+  <PropertyGroup>
+    <OutputType>WinExe</OutputType>
+    <TargetFramework>net6.0-windows</TargetFramework>
+    <RootNamespace>CodeSampleVb</RootNamespace>
+    <UseWPF>true</UseWPF>
+  </PropertyGroup>
+
+  <ItemGroup>
+    <Import Include="System.Windows" />
+    <Import Include="System.Windows.Controls" />
+    <Import Include="System.Windows.Data" />
+    <Import Include="System.Windows.Documents" />
+    <Import Include="System.Windows.Input" />
+    <Import Include="System.Windows.Media" />
+    <Import Include="System.Windows.Media.Imaging" />
+    <Import Include="System.Windows.Navigation" />
+    <Import Include="System.Windows.Shapes" />
+  </ItemGroup>
+
+</Project>
diff --git a/dotnet-desktop-guide/net/wpf/properties/snippets/read-only-dependency-properties/vb/MainWindow.xaml b/dotnet-desktop-guide/net/wpf/properties/snippets/read-only-dependency-properties/vb/MainWindow.xaml
new file mode 100644
index 0000000000..354196ff04
--- /dev/null
+++ b/dotnet-desktop-guide/net/wpf/properties/snippets/read-only-dependency-properties/vb/MainWindow.xaml
@@ -0,0 +1,12 @@
+<Window x:Class="CodeSampleVb.MainWindow"
+    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
+    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
+        Title="Readonly dependency properties" Height="100" Width="400">
+
+    <StackPanel>
+        
+        <Button Click="Button_Click">Increment property value</Button>
+        <Label Name="lblFishCount" Content="Aquarium fish count: 0"/>
+
+    </StackPanel>
+</Window>
diff --git a/dotnet-desktop-guide/net/wpf/properties/snippets/read-only-dependency-properties/vb/MainWindow.xaml.vb b/dotnet-desktop-guide/net/wpf/properties/snippets/read-only-dependency-properties/vb/MainWindow.xaml.vb
new file mode 100644
index 0000000000..8b029aa141
--- /dev/null
+++ b/dotnet-desktop-guide/net/wpf/properties/snippets/read-only-dependency-properties/vb/MainWindow.xaml.vb
@@ -0,0 +1,47 @@
+Namespace CodeSampleVb
+
+    ' <summary>
+    ' Interaction logic for MainWindow.xaml.
+    ' </summary>
+    Partial Public Class MainWindow
+        Inherits Window
+
+        ReadOnly _aquarium As New Aquarium()
+
+        Public Sub New()
+            InitializeComponent()
+        End Sub
+
+        Private Sub Button_Click(sender As Object, e As RoutedEventArgs)
+            ' Test setting a value.
+            _aquarium.SetValue(Aquarium.FishCountPropertyKey, _aquarium.FishCount + 1)
+            lblFishCount.Content = $"Aquarium fish count: {_aquarium.FishCount}"
+        End Sub
+
+    End Class
+
+    '<RegisterReadOnlyDependencyProperty>
+    Public Class Aquarium
+        Inherits DependencyObject
+
+        ' Register a dependency property with the specified property name,
+        ' property type, owner type, And property metadata.
+        ' Assign DependencyPropertyKey to a nonpublic field.
+        Friend Shared ReadOnly FishCountPropertyKey As DependencyPropertyKey =
+            DependencyProperty.RegisterReadOnly(
+                name:="FishCount",
+                propertyType:=GetType(Integer),
+                ownerType:=GetType(Aquarium),
+                typeMetadata:=New FrameworkPropertyMetadata())
+
+        ' Declare a public get accessor.
+        Public ReadOnly Property FishCount As Integer
+            Get
+                Return GetValue(FishCountPropertyKey.DependencyProperty)
+            End Get
+        End Property
+
+    End Class
+    '</RegisterReadOnlyDependencyProperty>
+
+End Namespace
diff --git a/dotnet-desktop-guide/net/wpf/toc.yml b/dotnet-desktop-guide/net/wpf/toc.yml
index 055406d8c4..b5d70db205 100644
--- a/dotnet-desktop-guide/net/wpf/toc.yml
+++ b/dotnet-desktop-guide/net/wpf/toc.yml
@@ -94,6 +94,8 @@ items:
       href: properties/dependency-property-metadata.md
     - name: Dependency property callbacks and validation
       href: properties/dependency-property-callbacks-and-validation.md
+    - name: Read-only dependency properties
+      href: properties/read-only-dependency-properties.md
     - name: Common tasks
       items:
       - name: Implement a dependency property
diff --git a/redirects_generator/definitions.json b/redirects_generator/definitions.json
index a4bfe064ad..8f8622e779 100644
--- a/redirects_generator/definitions.json
+++ b/redirects_generator/definitions.json
@@ -378,6 +378,11 @@
             "SourceUrl": "/dotnet/desktop/wpf/advanced/dependency-property-callbacks-and-validation?view=netframeworkdesktop-4.8",
             "TargetUrl": "/dotnet/desktop/wpf/properties/dependency-property-callbacks-and-validation?view=netdesktop-6.0"
         },
+        {
+            "Redirect": "TwoWay",
+            "SourceUrl": "/dotnet/desktop/wpf/advanced/read-only-dependency-properties?view=netframeworkdesktop-4.8",
+            "TargetUrl": "/dotnet/desktop/wpf/properties/read-only-dependency-properties?view=netdesktop-6.0"
+        },
 
         // Systems - XAML
         {