'X': 已知的物件無法在其建構函式中自行封送處理，或執行任何能讓其自行封送處理的動作 (例如將 'this' 指標當做參數傳送給遠端的方法)。

'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).