Task.Wait vs. await: When Does Asynchronous Waiting Lead to Deadlock?

C#asynchronous programming: the deadlock risk of task.wait and await

In C#asynchronous programming, understanding the difference between

and

is very important. Both are used to synchronize asynchronous operations, but the impact of realizing thread behavior is very different. Task.Wait await For example, if a

method uses

to wait for multiple tasks to complete, this synchronous obstruction method may lead to dead locks. Because the method and the asynchronous task it are waiting for on the same thread. The thread cannot continue asynchronous tasks after blocking, causing dead locks. GET Task.WaitAll On the contrary, is an asynchronous waiting mechanism. When encountering GET expressions, the method containing it will "pause" and return an unfinished task to the caller. This allows the caller to continue execution, while

expressions are asynchronous. When the expression is completed, the remaining part of the method is arranged for follow -up operation.

await In short, await synchronize the current thread, and it may cause dead locks when used with asynchronous tasks; await asynchronous waiting, will not block the thread, avoid dead locks and allow other tasks to execute concurrently. In order to avoid dead locks in the asynchronous scene, it is recommended to use the "full asynchronous" strategy and use await as the preferred mechanism for synchronous asynchronous operations.

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