add docfx samples.

Disp/DemoPick2.cs

@@ -0,0 +1,67 @@
+using Hi.Geom;
+using Hi.Disp;
+using System;
+using Hi.Coloring;
+
+namespace Sample.Disp
+{
+    /// <remarks>
+    /// ### Source Code
+    /// [!code-csharp[SampleCode](~/../Hi.Sample.Wpf/Disp/DemoPick2.cs)]
+    /// </remarks>
+    public class DemoPick2 : IDisplayee, IDisposable
+	{
+		readonly Pickable pickableA = new ShowEventPickable { Tag = "A" };
+		readonly Pickable pickableB = new ShowEventPickable { Tag = "B" };
+		readonly Pickable pickableC = new ShowEventPickable { Tag = "C" };
+		/// <inheritdoc/>
+		public void Display(Bind bind)
+		{
+			bind.PickID = pickableA.PickingID;
+			bind.RGB = ColorUtil.GetDiscreteRgb(1);
+			new Box3d(0, 0, 0, 1, 1, 1).DisplayFace(bind);
+
+			bind.PickID = pickableB.PickingID;
+			bind.RGB = ColorUtil.GetDiscreteRgb(2);
+			new Box3d(0, 0, 1, 1, 1, 2).DisplayFace(bind);
+
+			bind.PickID = pickableC.PickingID;
+			bind.RGB = ColorUtil.GetDiscreteRgb(3);
+			new Box3d(0, 0, 2, 1, 1, 3).DisplayFace(bind);
+
+			bind.PickID = 0;
+		}
+		/// <inheritdoc/>
+		public void ExpandToBox3d(Box3d dst)
+		{
+			dst.Expand(new Vec3d(0, 0, 0));
+			dst.Expand(new Vec3d(1, 1, 3));
+		}
+		#region IDisposable Support
+		private bool disposedValue = false; // To detect redundant calls
+		/// <inheritdoc/>
+		protected virtual void Dispose(bool disposing)
+		{
+			if (!disposedValue)
+			{
+				if (disposing)
+				{
+					pickableA.Dispose();
+					pickableB.Dispose();
+					pickableC.Dispose();
+				}
+				disposedValue = true;
+			}
+		}
+		/// <inheritdoc/>
+		public void Dispose()
+		{
+			Dispose(true);
+		}
+		#endregion
+		public static void Main()
+		{
+            DemoUtil.RunApplication("DemoPick2", new DemoPick2());
+		}
+	}
+}