整理一下项目文件

AIStudio.Wpf.DiagramDesigner/Messenger/MediatorMessageSinkAttribute.cs

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+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+
+namespace AIStudio.Wpf.DiagramDesigner
+{
+    /// <summary>
+    /// This attribute allows a method to be targeted as a recipient for a message.
+    /// It requires that the Type is registered with the MessageMediator through the
+    /// <seealso cref="MessageMediator.Register"/> method
+    /// </summary>
+    [AttributeUsage(AttributeTargets.Method)]
+    public sealed class MediatorMessageSinkAttribute : Attribute
+    {
+        /// <summary>
+        /// Message key
+        /// </summary>
+        public object MessageKey { get; private set; }
+
+        /// <summary>
+        /// Default constructor
+        /// </summary>
+        public MediatorMessageSinkAttribute()
+        {
+            MessageKey = null;
+        }
+
+        /// <summary>
+        /// Constructor that takes a message key
+        /// </summary>
+        /// <param name="messageKey">Message Key</param>
+        public MediatorMessageSinkAttribute(string messageKey)
+        {
+            MessageKey = messageKey;
+        }
+    }
+
+}