Enhance debugging in ViewHandler.cs (#29538)

* Enhance debugging in ViewHandler.cs

Added System.Diagnostics for debugging support. Introduced
DebuggerDisplay attribute to ViewHandler class and added
GetDebuggerDisplay method to improve object state visibility
during debugging.

* Update src/Core/src/Handlers/View/ViewHandler.cs

Co-authored-by: Copilot <175728472+Copilot@users.noreply.github.com>

---------

Co-authored-by: Gerald Versluis <gerald@verslu.is>
Co-authored-by: Copilot <175728472+Copilot@users.noreply.github.com>

Author: 3 people

src/Core/src/Handlers/View/ViewHandler.cs

@@ -1,4 +1,5 @@
 using Microsoft.Maui.Graphics;
+using System.Diagnostics;
 #if __IOS__ || MACCATALYST
 using PlatformView = UIKit.UIView;
 #elif __ANDROID__
@@ -18,6 +19,7 @@ namespace Microsoft.Maui.Handlers
 	/// </summary>
 	/// <remarks>Handlers map virtual views (.NET MAUI layer) to controls on each platform (iOS, Android, Windows, macOS, etc.), which are known as platform views.
 	/// Handlers are also responsible for instantiating the underlying platform view, and mapping the cross-platform control API to the platform view API. </remarks>
+	[DebuggerDisplay("{GetDebuggerDisplay(), nq}")]
 	public abstract partial class ViewHandler : ElementHandler, IViewHandler
 	{
 		/// <summary>
@@ -536,5 +538,20 @@ public static void MapToolTip(IViewHandler handler, IView view)
 				handler.ToPlatform().UpdateToolTip(tooltipContainer.ToolTip);
 #endif
 		}
+
+		/// <summary>
+		/// Provides a string representation of the current object for debugging purposes.
+		/// </summary>
+		/// <remarks>
+		/// This method is used by the <see cref="DebuggerDisplayAttribute"/> to display
+		/// a concise and informative string representation of the <see cref="ViewHandler"/> instance
+		/// during debugging sessions.
+		/// </remarks>
+		/// <returns>A string containing the type name and key properties of the object.</returns>
+		private protected virtual string GetDebuggerDisplay()
+		{
+			var debugText = DebuggerDisplayHelpers.GetDebugText(nameof(VirtualView), VirtualView, nameof(PlatformView), PlatformView);
+			return $"{GetType().FullName}: {debugText}";
+		}
 	}
 }