Update ObjectExtensionsTests to Include Derived Types

Directory.Build.props

@@ -8,8 +8,9 @@
     <!--CS1572: XML comment has a param tag for '[parameter]', but there is no parameter by that name -->
     <!--CS1573: Parameter has no matching param tag in the XML comment -->
     <!--CS1574: XML comment has cref attribute that could not be resolved-->
+    <!--CS1710: XML comment has a duplicate typeparam tag-->
     <!--CS1734: XML comment has a paramref tag, but there is no parameter by that name-->
-    <WarningsAsErrors>nullable,CS1570,CS1571,CS1572,CS1573,CS1574,CS1734</WarningsAsErrors>
+    <WarningsAsErrors>nullable,CS1570,CS1571,CS1572,CS1573,CS1574,CS1710,CS1734</WarningsAsErrors>
     <ProduceReferenceAssembly>True</ProduceReferenceAssembly>
     <GenerateErrorForMissingTargetingPacks>false</GenerateErrorForMissingTargetingPacks>
     <EnforceCodeStyleInBuild>true</EnforceCodeStyleInBuild>

src/CommunityToolkit.Maui.Markup.UnitTests/ObjectExtensionsTests.cs

@@ -15,6 +15,14 @@ public void AssignLabel()
 		Assert.That(ReferenceEquals(createdLabel, assignedLabel));
 	}
 
+	[Test]
+	public void AssignCustomLabel()
+	{
+		var createdLabel = new CustomLabel().Assign(out Label assignedLabel).Assign(out CustomLabel assignedCustomLabel);
+		Assert.That(ReferenceEquals(createdLabel, assignedLabel));
+		Assert.That(ReferenceEquals(assignedCustomLabel, assignedLabel));
+	}
+
 	[Test]
 	public void AssignString()
 	{
@@ -39,11 +47,30 @@ public void Invoke()
 		Assert.That(createdLabel.Text, Is.EqualTo(text));
 	}
 
+	[Test]
+	public void InvokeCustomEntry()
+	{
+		const string text = nameof(Invoke);
+
+		var createdLabel = new CustomEntry().Invoke(l => l.Text = text);
+		Assert.That(createdLabel.Text, Is.EqualTo(text));
+	}
+
 	[Test]
 	public void InvokeNullThrowsArgumentNullException()
 	{
 #pragma warning disable CS8625 // Cannot convert null literal to non-nullable reference type.
 		Assert.Throws<ArgumentNullException>(() => new Label().Invoke(null));
 #pragma warning restore CS8625 // Cannot convert null literal to non-nullable reference type.
 	}
+
+	class CustomLabel : Label
+	{
+
+	}
+
+	class CustomEntry : Entry
+	{
+
+	}
 }

src/CommunityToolkit.Maui.Markup/ObjectExtensions.cs

@@ -6,7 +6,7 @@
 public static class ObjectExtensions
 {
 	/// <summary>
-	/// Assign <typeparam name="TAssignable"/> to a variable
+	/// Assign <typeparamref name="TAssignable"/> to a variable
 	/// </summary>
 	/// <typeparam name="TAssignable"></typeparam>
 	/// <typeparam name="TVariable"></typeparam>
@@ -21,7 +21,7 @@ public static class ObjectExtensions
 	}
 
 	/// <summary>
-	/// Perform an action on <typeparam name="TAssignable"/>
+	/// Perform an action on <typeparamref name="TAssignable"/>
 	/// </summary>
 	/// <typeparam name="TAssignable"></typeparam>
 	/// <param name="assignable"></param>