Why Use Async/Await Over Normal Threading or Tasks?

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Yes, it is a syntactic sugar that makes dealing with threads much easier, it also makes the code easier to maintain, because the thread management is done by run-time. await release the thread immediately and allows that thread or another one to pick up where it left off, even if done on the main thread.

Like other abstractions, if you want complete control over the mechanisms under the covers, then you are still free to implement similar logic using thread signaling, etc.

If you are interested in seeing what async/await produces then you can use Reflector or ILSpy to decompile the generated code.

Read What does async & await generate? for a description of what C# 5.0 is doing on your behalf.

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