Add another example app

App/KingPing/Program.cs

@@ -0,0 +1,17 @@
+using Avalonia;
+using System;
+
+namespace KingPing
+{
+    internal class Program
+    {
+        [STAThread]
+        public static void Main(string[] args) => BuildAvaloniaApp()
+            .StartWithClassicDesktopLifetime(args);
+
+        public static AppBuilder BuildAvaloniaApp()
+            => AppBuilder.Configure<App>()
+                .UsePlatformDetect()
+                .LogToTrace();
+    }
+}