KeyValuePair<int,string> pair = (KeyValuePair<int,string>)obj;

------解决方案--------------------
(KeyValuePair)obj
或者
obj as KeyValuePair

------解决方案--------------------
KeyValuePair<int,string> pair = (KeyValuePair<int,string>)obj;
或者
KeyValuePair<int,string> pair = obj as KeyValuePair<int,string>;

------解决方案--------------------
探讨


C# code
KeyValuePair<int,string> pair = (KeyValuePair<int,string>)obj;