improved dialog

src/Shared/HandyControlDemo_Shared/Window/DialogDemoWindow.xaml.cs

@@ -0,0 +1,10 @@
+namespace HandyControlDemo.Window
+{
+    public partial class DialogDemoWindow
+    {
+        public DialogDemoWindow()
+        {
+            InitializeComponent();
+        }
+    }
+}