没有，你不能。 C＃不执行鸭打字。

No, you cannot. C# does not implement duck typing.

您必须实现接口和投给它。

You must implement an interface and cast to it.

（但也有尝试这样做。看的Duck打字项目一个例子。）

(However there are attempts to do it. Look at Duck Typing Project for an example.)