How to Properly Handle Fire-and-Forget Async Methods in ASP.NET MVC?

Managing Fire-and-Forget Asynchronous Operations in ASP.NET MVC Controllers

Asynchronous "fire-and-forget" methods, such as DeleteFooAsync, are frequently encountered in asynchronous programming. While the conventional advice is to avoid async/await in these scenarios, this can be impractical when a synchronous counterpart is unavailable.

Simply handling unobserved exceptions using TaskScheduler.UnobservedTaskException is unreliable, as synchronization context issues can arise.

Wrapping the asynchronous method within a try-catch block, as shown below, addresses exceptions but proves cumbersome for numerous methods:

<code class="language-csharp">private async void DeleteFooWrapperAsync()
{
    try
    {
        await DeleteFooAsync();
    }
    catch (Exception exception)
    {
        m_log.Error("DeleteFooAsync failed: " + exception.ToString());
    }
}</code>

The most robust solution for fire-and-forget calls within an ASP.NET MVC controller is employing Task.Run:

<code class="language-csharp">Task foo = Task.Run(() => DeleteFooAsync());</code>

This offloads the asynchronous operation to a separate thread, preventing it from blocking the response and ensuring reliable execution.

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