add poptip

src/Shared/HandyControlDemo_Shared/UserControl/Controls/PoptipDemoCtl.xaml.cs

@@ -0,0 +1,11 @@
+
+namespace HandyControlDemo.UserControl
+{
+    public sealed partial class PoptipDemoCtl
+    {
+        public PoptipDemoCtl()
+        {
+            this.InitializeComponent();
+        }
+    }
+}