调整一下删除拷贝，我也不记得之前为啥这样写了。

AIStudio.Wpf.DiagramDesigner/ViewModels/BaseViewModel/Connector/LogicalConnectorInfo.cs

@@ -68,17 +68,22 @@ namespace AIStudio.Wpf.DiagramDesigner
             }
         }
 
-        public ConnectorValueType _valueType;
+        public ConnectorValueType _connectorValueType;
         public ConnectorValueType ConnectorValueType
         {
             get
             {
-                return _valueType;
+                return _connectorValueType;
             }
             set
             {
-                SetProperty(ref _valueType, value);
+                SetProperty(ref _connectorValueType, value);
             }
         }
+
+        public bool IsError
+        {
+            get;set;
+        }
     }
 }