添加demo项目

添加demo项目

Co-Authored-By: NaBian <836904362@qq.com>

HandyControlDemo/MainWindow.xaml.cs

@@ -0,0 +1,13 @@
+namespace HandyControlDemo
+{
+    /// <summary>
+    /// MainWindow.xaml 的交互逻辑
+    /// </summary>
+    public partial class MainWindow
+    {
+        public MainWindow()
+        {
+            InitializeComponent();
+        }
+    }
+}