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    <p>I recommend using the <a href="http://msdn.microsoft.com/en-us/library/y5htx827.aspx" rel="nofollow noreferrer">ThreadPool</a> for your task. Its algorithm will generally be more efficient than something you can roll by hand.</p> <p>Now the fun part is getting notified when all of your threads complete. Unless you have really specific needs which make this solution unsuitable, it should be easy enough to implement with the <a href="http://msdn.microsoft.com/en-us/library/system.threading.countdownevent.aspx" rel="nofollow noreferrer">CountdownEvent</a> class, which is a special kind of waithandle that waits until its been signaled <code>n</code> times. Here's an example:</p> <pre><code>using System; using System.Linq; using System.Threading; using System.Diagnostics; namespace CSharpSandbox { class Program { static void SomeTask(int sleepInterval, CountdownEvent countDown) { try { // pretend this did something more profound Thread.Sleep(sleepInterval); } finally { // need to signal in a finally block, otherwise an exception may occur and prevent // this from being signaled countDown.Signal(); } } static CountdownEvent StartTasks(int count) { Random rnd = new Random(); CountdownEvent countDown = new CountdownEvent(count); for (int i = 0; i &lt; count; i++) { ThreadPool.QueueUserWorkItem(_ =&gt; SomeTask(rnd.Next(100), countDown)); } return countDown; } public static void Main(string[] args) { Console.WriteLine("Starting. . ."); var stopWatch = Stopwatch.StartNew(); using(CountdownEvent countdownEvent = StartTasks(100)) { countdownEvent.Wait(); // waits until the countdownEvent is signalled 100 times } stopWatch.Stop(); Console.WriteLine("Done! Elapsed time: {0} milliseconds", stopWatch.Elapsed.TotalMilliseconds); } } } </code></pre>
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    1. COI knew you'd answer the question the way I wanted. Thanks Juliet.
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