How Can I Safely Call Async Methods in C# Without Using `await` and Still Handle Exceptions?

Safely Invoking Asynchronous C# Methods Without await

The provided code demonstrates calling the asynchronous method MyAsyncMethod() without using await. This practice generates a warning and potentially silences exceptions. This article presents solutions to handle exceptions effectively while ignoring the asynchronous operation's outcome.

Method 1: ContinueWith for Exception Handling

This approach uses the ContinueWith method to asynchronously manage exceptions from MyAsyncMethod():

<code class="language-csharp">MyAsyncMethod()
    .ContinueWith(t => Console.WriteLine(t.Exception),
        TaskContinuationOptions.OnlyOnFaulted);</code>

This code snippet attaches a continuation task to MyAsyncMethod(). If MyAsyncMethod() throws an exception, the continuation task executes, writing the exception details to the console on a separate thread.

Method 2: await and try-catch for Precise Exception Management

Alternatively, utilizing await and a try-catch block offers more granular exception handling:

<code class="language-csharp">try
{
    await MyAsyncMethod().ConfigureAwait(false);
}
catch (Exception ex)
{
    Trace.WriteLine(ex);
}</code>

This method provides targeted exception handling via try-catch. ConfigureAwait(false) prevents the exception from being marshaled back to the original context, allowing the current thread to continue its execution.

Both methods ensure exception safety when calling asynchronous methods without awaiting their results. Choose the approach that best suits your specific needs and exception-handling requirements.

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