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    <p>There is no universal 'best' way to thread work. You just have to try different ways of doing things, I'm afraid. </p> <p>I particularly like Jeremy D. Miller's continuation idea described <a href="http://msdn.microsoft.com/en-us/magazine/ee309512.aspx" rel="nofollow noreferrer">at this page</a> (scroll down to find the "continuations" section). It's really elegant and means writing very little boilerplate code.</p> <p>Basically, when you call "ExecuteWithContinuation" with a Func argument, the function is executed asynchronously, then returns an action when it finishes. The action is then marshalled back onto your UI thread to act as a continuation. This allows you to quickly split your operations into two bits: </p> <ol> <li>Perform long running operation that shouldn't block the UI</li> <li>... when finished, update the UI on the UI thread </li> </ol> <p>It takes a bit of getting used to, but it's pretty cool. </p> <pre><code>public class AsyncCommandExecutor : ICommandExecutor { private readonly SynchronizationContext m_context; public AsyncCommandExecutor(SynchronizationContext context) { if (context == null) throw new ArgumentNullException("context"); m_context = context; } public void Execute(Action command) { ThreadPool.QueueUserWorkItem(o =&gt; command()); } public void ExecuteWithContinuation(Func&lt;Action&gt; command) { ThreadPool.QueueUserWorkItem(o =&gt; { var continuation = command(); m_context.Send(x =&gt; continuation(), null); }); } } </code></pre> <p>You'd then use it like this (forgive the formatting...)</p> <pre><code>public void DoSomethingThatTakesAgesAndNeedsToUpdateUiWhenFinished() { DisableUi(); m_commandExecutor.ExecuteWithContinuation( () =&gt; { // this is the long-running bit ConnectToServer(); // This is the continuation that will be run // on the UI thread return () =&gt; { EnableUi(); }; }); } </code></pre>
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    1. POWhat is the best way to thread work in c#?
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    1. USMark Simpson
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    1. COThank you for the answer. How can I use it without lambda in .NET 2.0?
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    2. COMark now I'm on .NET 3.5. I got the error:Using the generic type 'System.Action<T>' requires '1' type arguments. What to do?
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    3. CO"Action<T>" is the generic action that has one parameter; the code I posted just uses "Action" which has no parameters. It looks like you're trying to use Action<T> instead of Action. http://msdn.microsoft.com/en-us/library/system.action.aspx
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