https://msdn.microsoft.com/ko-kr/library/system.runtime.remoting.messaging.callcontext(v=vs.110).aspx
槽不在其他逻辑线程上调用上下文之间共享。
The slots are not shared across call contexts on other logical threads.
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原文：http://www.cnblogs.com/ok519/p/6369038.html