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    <p>You are not required to call <code>EndInvoke</code>; not calling it merely means:</p> <ul> <li>You don't get the return value from the method.</li> <li>Any exceptions thrown during the method execution will simply disappear.</li> </ul> <p>It sounds like you want to 'fire-and-forget', so the easiest way to do this is to use an anonymous delegate, for example:</p> <pre><code>var del = new Action(foo.Bar); del.BeginInvoke(iar =&gt; { try { del.EndInvoke(iar); } catch (Exception ex) { // Log the message? } }, null); </code></pre> <p>This is what happens when you execute this code:</p> <ol> <li>A new thread is allocated (put simply) for the delegate.</li> <li>The thread is given the delegate <code>del</code> and the anonymous delegate (<code>iar =&gt; ...</code>).</li> <li>The thread executes <code>del</code>.</li> <li>When it is finished executing (or an exception occurs) the result or exception is stored and the anonymous delegate is executed.</li> <li>Inside the anonymous delegate, when <code>EndInvoke</code> is called the result from the method is either returned, or the exception is thrown (if one occurred).</li> </ol> <p>Note that the above example is very different from:</p> <pre><code>// This is pointless and is still, essentially, synchronous. del.EndInvoke(del.BeginInvoke(null, null)); </code></pre> <p><strong>Edit:</strong> You should always call <code>End*</code>. I've never found a scenario where not calling it presents a problem, however that is an implementation detail and is <a href="https://stackoverflow.com/questions/4585042/is-delegate-endinvoke-really-necessary">relying on undocumented behavior.</a></p> <p>Finally your solution would crash the process if an exception is thrown, <strike>you can simply pass null as the delegate if you don't care about the exception (<code>del.BeginInvoke(myStruct, null, null);</code>).</strike> So as a final example what you are looking for is probably:</p> <pre><code>public class A { // ... void Foo(S myStruct){...} void FooAsync(S myStruct) { var del = new Action&lt;S&gt;(Foo); del.BeginInvoke(myStruct, SuppressException, del); } static void SuppressException(IAsyncResult ar) { try { ((Action&lt;S&gt;)ar.AsyncState).EndInvoke(ar); } catch { // TODO: Log } } } </code></pre>
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    1. USJonathan Dickinson
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    1. COTrue, you are not "required" to call `EndInvoke`, but if you don't you'll get memory leaks. http://stackoverflow.com/questions/1712741/why-does-asynchronous-delegate-method-require-calling-endinvoke?rq=1
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      1. USMatt Klein
 

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