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copied!<h3>Edit</h3> <p>Please consider Theo Yaung's <a href="https://stackoverflow.com/questions/5032784/async-ctp-and-finally/5040103#5040103">answer</a>.</p> <h3>Original answer</h3> <p>I'm not familiar with async/await, but after reading this: <a href="http://www.eggheadcafe.com/tutorials/aspnet/e78665f9-b949-4cc7-a024-654eb3bbad6d/visual-studio-async-ctp-overview.aspx" rel="nofollow noreferrer">Visual Studio Async CTP Overview</a></p> <p>and reading your code, I see the <code>await</code> in the <code>Func(int n)</code> function, meaning that from the code <i>after</i> the <code>await</code> keyword till the end of the function will be executed later as a delegate.</p> <p>So <i>my guess</i> (and this is an uneducated guess) is that the <code>Func:Begin</code> and <code>Func:End</code> will possibly execute in different "contexts" (threads?), i.e., asynchronously.</p> <p>Thus, the <code>int u = await Func( i );</code> line in <code>Consumer</code> will continue its execution the moment the code <code>await</code> in <code>Func</code> will be reached. So it is quite possible to have:</p> <pre><code>Consumer: before await #1 Func: Begin #1 Consumer: after await #1 Consumer: before await #2 Func: Begin #2 Consumer: after await #2 Consumer: after the loop Func: End #1 // Can appear at any moment AFTER "after await #1" // but before "After the wait" Func: Finally #1 // will be AFTER "End #1" but before "After the wait" Func: End #2 // Can appear at any moment AFTER "after await #2" // but before "After the wait" Func: Finally #2 // will be AFTER "End #2" but before "After the wait" After the wait // will appear AFTER the end of all the Tasks </code></pre> <p>The <code>Func: End</code> and <code>Func: Finally</code> can appear in whatever position in the logs, the only constraint being that a <code>Func: End #X</code> will appear before its associated <code>Func: Finally #X</code>, and that both should appear before the <code>After the wait</code>.</p> <p>As explained (somewhat abruptly) by Henk Holterman is that the fact you put an <code>await</code> in the <code>Func</code> body means that everything after will be executed <i>sometimes</i> after.</p> <p>There is no workaround as, <code>by design</code> you put a <code>await</code> between the <code>Begin</code> and the <code>End</code> of <code>Func</code>.</p> <p>Just my uneducated 2 eurocents.</p>

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