Should You Return `Task` Directly or Use `return await` in Asynchronous Programming?

The return value in asynchronous programming: directly return

or use ? Task return await In asynchronous programming, developers are often entangled in returning or using the

structure. This article will clarify this problem and explain the superiority of

through a specific scene. Task<T> return await Why choose return await instead of returning

directly?

Under normal circumstances, return return await and Task<T> structural functions. However, there are subtle differences between the two when the statement or more commonly used in the block.

Please consider the following code example: Task<T> return await using try Scene analysis return await

In the first method (

), the

<code class="language-csharp">Task<SomeResult> DoSomethingAsync()
{
    using (var foo = new Foo())
    {
        return foo.DoAnotherThingAsync();
    }
}</code>

statement will immediately release the

<code class="language-csharp">async Task<SomeResult> DoSomethingAsync()
{
    using (var foo = new Foo())
    {
        return await foo.DoAnotherThingAsync();
    }
}</code>

object immediately after the

method returns. This may happen for a long time before the method is completed, and errors are caused by premature release.

On the contrary, the second method (using

) will wait before the await method is completed, and then release using. This ensures the correct release and normal operation of . DoAnotherThingAsync() Foo Conclusion Foo

Although await is usually equivalent to DoAnotherThingAsync() function directly, the latter is better than using the Foo statement or in the Foo scene in the

block. In this case, the structure ensures the correct release and execution of resources, prevent potential traps, and ensure reliable asynchronous operations.

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