Clarify user control consumer terminology and add minimum viable code explanation

dotnet-desktop-guide/winforms/controls-design/how-to-create-usercontrol.md

@@ -25,6 +25,26 @@ helpviewer_keywords:
 
 This article teaches you how to add a user control to your project and then add that user control to a form. You'll create a reusable user control that's both visually appealing and functional. The new control groups a <xref:System.Windows.Forms.TextBox> control with a <xref:System.Windows.Forms.Button> control. When the user selects the button, the text in the text box is cleared. For more information about user controls, see [User control overview](usercontrol-overview.md).
 
+## Understanding user control consumers
+
+Throughout this article, the term **consumer** refers to any code that uses your user control. This includes:
+
+- **Forms** that contain your user control.
+- **Other controls** that host your user control.
+- **Applications** that reference your user control library.
+
+When you create a user control, you're building a reusable component. The consumer is whoever uses that component by placing it on a form, setting its properties, or responding to its events. The consumer doesn't need to know about the internal controls (like the `TextBox` and `Button`) that make up your user control—they only interact with the properties and events you choose to expose.
+
+## Essential code pattern for user controls
+
+Before adding the detailed implementation, it's helpful to understand the minimum viable code pattern for a user control. At its core, a user control needs:
+
+- **Event forwarding** - Pass events from internal controls to the consumer.
+- **Property exposure** - Allow the consumer to access internal control properties.
+- **Logical behavior** - Handle interactions between internal controls.
+
+The following code demonstrates these patterns. You don't need all of this code for a basic user control, but these patterns help create a professional, reusable component that integrates well with the designer and consumer applications.
+
 ## Add a new user control
 
 After opening your Windows Forms project in Visual Studio, use the Visual Studio templates to create a user control:
@@ -91,27 +111,28 @@ The user control is made up of _constituent controls_, which are the controls yo
     :::image type="content" source="./media/how-to-create-usercontrol/example-initial-design.png" alt-text="Visual Studio with Windows Forms, showing the user control that was just designed.":::
 
 01. Press <kbd>F7</kbd> to open the code editor for the `ClearableTextBox` class.
+
 01. Make the following code changes:
 
     01. At the top of the code file, import the `System.ComponentModel` namespace.
-    01. Add the `DefaultEvent` attribute to the class. This attribute sets which event is generated by the consumer when the control is double-clicked in the designer. The consumer being the object declaring and using this control. For more information about attributes, see [Attributes (C#)](/dotnet/csharp/programming-guide/concepts/attributes/index) or [Attributes overview (Visual Basic)](/dotnet/visual-basic/programming-guide/concepts/attributes/index).
+    01. Add the `DefaultEvent` attribute to the class. This attribute sets which event is generated when the consumer (the form or application using this control) double-clicks the control in the designer. For more information about attributes, see [Attributes (C#)](/dotnet/csharp/programming-guide/concepts/attributes/index) or [Attributes overview (Visual Basic)](/dotnet/visual-basic/programming-guide/concepts/attributes/index).
 
         :::code language="csharp" source="./snippets/how-to-create-usercontrol/csharp/ClearableTextBox.cs" id="default_event":::
         :::code language="vb" source="./snippets/how-to-create-usercontrol/vb/ClearableTextBox.vb" id="default_event":::
 
-    01. Add an event handler that forwards the [`TextBox.TextChanged`](xref:System.Windows.Forms.Control.TextChanged) event to the consumer:
+    01. Add an event handler that forwards the [`TextBox.TextChanged`](xref:System.Windows.Forms.Control.TextChanged) event to consumers of your user control:
 
         :::code language="csharp" source="./snippets/how-to-create-usercontrol/csharp/ClearableTextBox.cs" id="text_changed":::
         :::code language="vb" source="./snippets/how-to-create-usercontrol/vb/ClearableTextBox.vb" id="text_changed":::
 
         Notice that the event has the `Browsable` attribute declared on it. When the `Browsable` is applied to an event or property, it controls whether or not the item is visible in the **Properties** window when the control is selected in the designer. In this case, `true` is passed as a parameter to the attribute indicating that the event should be visible.
 
-    01. Add a string property named `Text`, which forwards the [`TextBox.Text`](xref:System.Windows.Forms.Control.Text%2A) property to the consumer:
+    01. Add a string property named `Text`, which exposes the [`TextBox.Text`](xref:System.Windows.Forms.Control.Text%2A) property to consumers of your user control:
 
         :::code language="csharp" source="./snippets/how-to-create-usercontrol/csharp/ClearableTextBox.cs" id="text":::
         :::code language="vb" source="./snippets/how-to-create-usercontrol/vb/ClearableTextBox.vb" id="text":::
 
-    01. Add a string property named `Title`, which forwards the [`Label.Text`](xref:System.Windows.Forms.Label.Text%2A) property to the consumer:
+    01. Add a string property named `Title`, which exposes the [`Label.Text`](xref:System.Windows.Forms.Label.Text%2A) property to consumers of your user control:
 
         :::code language="csharp" source="./snippets/how-to-create-usercontrol/csharp/ClearableTextBox.cs" id="title":::
         :::code language="vb" source="./snippets/how-to-create-usercontrol/vb/ClearableTextBox.vb" id="title":::