添加项目文件。

Sai.Toolkit.Mvvm/BindingProxy.cs

@@ -0,0 +1,28 @@
+using System;
+using System.Collections.Generic;
+using System.Text;
+using System.Windows;
+
+namespace Sai.Toolkit.Mvvm
+{
+	/// <summary>
+	/// 绑定代理，用来传递绑定对象
+	/// </summary>
+	public class BindingProxy : Freezable
+	{
+		protected override Freezable CreateInstanceCore() => new BindingProxy();
+
+		public object Data
+		{
+			get { return (object)GetValue(DataProperty); }
+			set { SetValue(DataProperty, value); }
+		}
+
+		// Using a DependencyProperty as the backing store for Data.  This enables animation, styling, binding, etc...
+		public static readonly DependencyProperty DataProperty = DependencyProperty.Register(
+			nameof(Data),
+			typeof(object),
+			typeof(BindingProxy)
+		);
+	}
+}