update to v1.2.1

HandyControlDemo/UserControl/Controls/TabControlDemoCtl.xaml.cs

@@ -0,0 +1,14 @@
+// ReSharper disable once CheckNamespace
+namespace HandyControlDemo.UserControl
+{
+    /// <summary>
+    /// TabControlDemoCtl.xaml 的交互逻辑
+    /// </summary>
+    public partial class TabControlDemoCtl
+    {
+        public TabControlDemoCtl()
+        {
+            InitializeComponent();
+        }
+    }
+}