添加项目文件。

AIStudio.Wpf.ADiagram/Controls/CancelRoutedEventArgs.cs

@@ -0,0 +1,18 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+using System.Windows;
+
+namespace AIStudio.Wpf.ADiagram.Controls
+{
+    public class CancelRoutedEventArgs : RoutedEventArgs
+    {
+        public CancelRoutedEventArgs(RoutedEvent routedEvent, object source) : base(routedEvent, source)
+        {
+        }
+
+        public bool Cancel { get; set; }
+    }
+}