diff --git a/Disp/DemoPickable.cs b/Disp/DemoPickable.cs
index abca6e1..8dc9b46 100644
--- a/Disp/DemoPickable.cs
+++ b/Disp/DemoPickable.cs
@@ -2,60 +2,57 @@
 using Hi.Geom;
 using System;
 
-namespace Sample.Disp
+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)]
+/// </remarks>
+public class DemoPickable : IDisplayee
 {
-    /// <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)]
-    /// </remarks>
-    public class DemoPickable : IDisplayee
+	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()
 	{
-		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();
-			double pid = pickable.PickingID;
-			double[] vs = new double[] {
-				//pickID, x,y,z
-				pid, 0,0.1,0.1,
-				pid, 0.1,0,0,
-				pid, 0.1,0,0.1
-			};
-			draw = new Drawing(vs, Stamp.PV, GL.GL_TRIANGLES);
-		}
-        /// <inheritdoc/>
-        public void Display(Bind bind)
-		{
-			draw.Display(bind);
-		}
-        /// <inheritdoc/>
-        public void ExpandToBox3d(Box3d dst)
-		{
-			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()
-		{
-            DemoUtil.RunApplication("DemoPickable", new DemoPickable());
-		}
+		pickable = new ShowEventPickable();
+		double pid = pickable.PickingID;
+		double[] vs = new double[] {
+			//pickID, x,y,z
+			pid, 0,0.1,0.1,
+			pid, 0.1,0,0,
+			pid, 0.1,0,0.1
+		};
+		draw = new Drawing(vs, Stamp.PV, GL.GL_TRIANGLES);
+	}
+	/// <inheritdoc/>
+	public void Display(Bind bind)
+	{
+		draw.Display(bind);
+	}
+	/// <inheritdoc/>
+	public void ExpandToBox3d(Box3d dst)
+	{
+		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()
+	{
+		DemoUtil.RunApplication("DemoPickable", new DemoPickable());
+	}
 }