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IAsyncOperation<T>^ asyncOperation = create_async( []() { return create_task(FirstAsync(...)) .then( [](X val){ return SecondAsync(val, ...); }).then( [](Y val) return ThirdAsync(val, ...); });
这段代码会执行FirstAsync->SecondAsync->ThirdAsync，最后返回的是 ThirdAsync的结果。
http://www.cnblogs.com/zjjcy/archive/2012/05/13/2489298.html
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原文地址：http://www.cnblogs.com/jiahuafu/p/5242878.html
