新增自定义弹框窗口

新增吐司提示

System.Application.SteamTools.Client.Desktop/UI/ViewModels/Windows/MessageWindow.cs

@@ -0,0 +1,14 @@
+using System;
+using System.Collections.Generic;
+using System.Text;
+
+namespace System.Application.UI.ViewModels.Windows
+{
+    public class MessageWindow : WindowViewModel
+    {
+        public MessageWindow() 
+        {
+            Title = "";
+        }
+    }
+}