Starts an asynchronous data synchronization operation 启动异步数据同步操作。
2.
The purpose of the synchronization model implemented by this class is to allow the internal asynchronous synchronization operations of the common language runtime to behave properly with different synchronization models 此类实现的同步模型的目的是使公共语言运行库内部的异步/同步操作能够针对不同的异步模型采取正确的行为。
