“X”: 已知对象不能在其构造函数中封送自身，也不能执行任何将导致自身被封送的操作(例如将“this”指针作为参数传递给远程方法)。

'X': A well-known object cannot marshal itself in its constructor, or perform any action that would cause it to be marshaled (such as passing the 'this' pointer as a parameter to a remote method).