add Dialog

HandyControlDemo/ViewModel/Controls/DialogDemoViewModel.cs

@@ -0,0 +1,19 @@
+using System;
+using GalaSoft.MvvmLight;
+using GalaSoft.MvvmLight.CommandWpf;
+using HandyControl.Controls;
+using HandyControlDemo.UserControl;
+
+namespace HandyControlDemo.ViewModel
+{
+    public class DialogDemoViewModel : ViewModelBase
+    {
+        public RelayCommand ShowTextCmd => new Lazy<RelayCommand>(() =>
+            new RelayCommand(ShowText)).Value;
+
+        private void ShowText()
+        {
+            Dialog.Show(new TextDialog());
+        }
+    }
+}