migrate doc to wwwroot.

Disp/DemoDrawing.cs

@@ -6,12 +6,21 @@ using Hi.Coloring;
 
 namespace Sample.Disp
 {
+    /// <summary>
+    /// Demonstrates various drawing techniques using the HiAPI graphics system.
+    /// Provides examples of primitive drawing, attribute specification, and rendering options.
+    /// Includes methods for drawing lines, points, triangles, and other geometric primitives.
+    /// </summary>
     /// <remarks>
     /// ### Source Code
     /// [!code-csharp[SampleCode](~/../Hi.Sample.Wpf/Disp/DemoDrawing.cs)]
     /// </remarks>
     public static class DemoDrawing
 	{
+		/// <summary>
+		/// Demonstrates simple line drawing using raw vertex coordinates.
+		/// Creates a basic line strip from three vertices and displays it using DemoUtil.
+		/// </summary>
 		public static void FreeDrawing()
 		{
 			#region DocSite.FreeDrawing
@@ -24,6 +33,11 @@ namespace Sample.Disp
 			#endregion
 		}
 
+		/// <summary>
+		/// Demonstrates various types of line drawing techniques.
+		/// Shows how to create points, line strips, line strips with normals, and colored line strips.
+		/// Illustrates different ways to specify vertex attributes like position, color, and normal.
+		/// </summary>
 		public static void DrawLines()
 		{
 			List<Vec3d> ps;
@@ -95,6 +109,11 @@ namespace Sample.Disp
 				, drawLineStripWithNormal, drawLineStripWithColor));
 		}
 
+		/// <summary>
+		/// Demonstrates drawing triangles using OpenGL primitives.
+		/// Shows how to create colored triangles (CV) and colored triangles with normals (CNV).
+		/// Illustrates packing of vertex attributes (color, normal, position) into arrays for rendering.
+		/// </summary>
 		public static void DrawTrianglesByPrimitives()
 		{
 			int n = 10;// triangle num
@@ -151,6 +170,11 @@ namespace Sample.Disp
 				new DispList(new RgbTreat(1, 0, 0), drawTrisCV, drawTrisCNV));
 		}
 
+		/// <summary>
+		/// Demonstrates drawing 3D triangles using the Tri3d helper class.
+		/// Creates a series of triangles and renders them as both face (filled) and line (wireframe) drawings.
+		/// Shows how to apply different colors to faces and lines of the same geometry.
+		/// </summary>
 		public static void DrawTri3d()
 		{
 			int n = 10;