完成Grid示例

RazorEngineTest/UICollection.cs

@@ -0,0 +1,15 @@
+using System;
+using System.Collections.Generic;
+using System.Collections.ObjectModel;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+using System.Windows;
+
+namespace RazorEngineTest
+{
+    public class UICollection : ObservableCollection<UIElement>
+    {
+        public UICollection() { }
+    }
+}