异步http请求。 不用通常的线程模型。使用者可以放心使用，不用担心资源冲突。-asynchronous http requests. Not usually the thread model. Users can be assured use without fear of resource conflicts.

C#编程，异步调用 ，异步调用 -C# programming, asynchronous calls, asynchronous calls, asynchronous calls, asynchronous calls

webservice同步、异步功能应用；异步委托功能应用；线程应用-WebService synchronous, asynchronous function application asynchronous delegate function application thread application