migrate doc to wwwroot.

Disp/DemoPickable.cs

@@ -4,6 +4,11 @@ using System;
 
 namespace Sample.Disp
 {
+    /// <summary>
+    /// Demonstrates creation of pickable 3D geometry at the primitive level.
+    /// Shows how to assign picking IDs directly to geometry vertices and create interactive triangles.
+    /// Uses a lower-level approach than the Pickable base class for more precise control.
+    /// </summary>
     /// <remarks>
     /// ### Source Code
     /// [!code-csharp[SampleCode](~/../Hi.Sample.Wpf/Disp/DemoPickable.cs)]
@@ -13,6 +18,10 @@ namespace Sample.Disp
 		private readonly Drawing draw;
 		private readonly ShowEventPickable pickable;
 
+		/// <summary>
+		/// Initializes a new instance of DemoPickable.
+		/// Creates a pickable triangle with a specific picking ID for user interaction.
+		/// </summary>
 		public DemoPickable()
 		{
 			pickable = new ShowEventPickable();
@@ -36,6 +45,11 @@ namespace Sample.Disp
 			draw.ExpandToBox3d(dst);
 		}
 
+		/// <summary>
+		/// Entry point for the DemoPickable example.
+		/// Creates and displays a pickable triangle that can respond to mouse events.
+		/// Demonstrates integration of picking functionality with geometric primitives.
+		/// </summary>
 		[STAThread]
 		public static void Main()
 		{