Specifically , the rcw provides marshaling for method arguments and method return values whenever the client and server have different representations of the data passed between them 具体地说，只要客户端和服务器之间传递了表示形式不同的数据， rcw就会为方法参数和方法返回值提供封送处理。
Method should be modified to delay the call until the thread is about to terminate and there are no rcws and their underlying com components still in use by the thread 方法的代码修改为延迟此调用，一直延迟到线程即将终止并且没有任何rcw及其基础com组件仍在被线程使用为止。但是，如果无法修改调用
This is most commonly caused by sta apartments being shut down before all the com components owned by the apartment were completely released this can occur as a result of an explicit call from user code on an rcw or while the clr itself is manipulating the com component , for example when the clr is releasing the com component when the associated rcw has been garbage collected 最常见的原因就是：在sta单元拥有的所有com组件被完全释放之前， sta单元已经关闭。从用户代码对rcw发出显式调用时，或clr自行操作com组件时（例如，在对关联的rcw已经进行垃圾回收之后， clr释放com组件） ，就可能会发生这种情况。
