migrate doc to wwwroot.

Disp/DemoUtil.cs

@@ -6,12 +6,24 @@ using System.Windows;
 
 namespace Sample.Disp
 {
+    /// <summary>
+    /// Provides utility functions for running HiAPI display examples in a WPF environment.
+    /// Contains helper methods that simplify the setup and execution of WPF applications with HiAPI rendering.
+    /// Handles common initialization and cleanup tasks for visualization examples.
+    /// </summary>
     /// <remarks>
     /// ### Source Code
     /// [!code-csharp[SampleCode](~/../Hi.Sample.Wpf/Disp/DemoUtil.cs)]
     /// </remarks>
     public static class DemoUtil
     {
+        /// <summary>
+        /// Creates and runs a WPF application with a RenderingWindow to display 3D content.
+        /// Handles proper initialization and cleanup of HiAPI resources including MongoDB server,
+        /// display engine, and licensing.
+        /// </summary>
+        /// <param name="title">The title for the application window</param>
+        /// <param name="displayee">The object that implements IDisplayee to be rendered</param>
         public static void RunApplication(string title, IDisplayee displayee)
         {
             Application app = new Application();