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copied!<p>There is no need to implement your own, since it is not very hard to use the existing .NET implementation.</p> <p>From <a href="http://msdn.microsoft.com/en-us/library/3dasc8as(VS.80).aspx" rel="noreferrer">http://msdn.microsoft.com/en-us/library/3dasc8as(VS.80).aspx</a>:</p> <pre><code>using System; using System.Threading; public class Fibonacci { public Fibonacci(int n, ManualResetEvent doneEvent) { _n = n; _doneEvent = doneEvent; } // Wrapper method for use with thread pool. public void ThreadPoolCallback(Object threadContext) { int threadIndex = (int)threadContext; Console.WriteLine("thread {0} started...", threadIndex); _fibOfN = Calculate(_n); Console.WriteLine("thread {0} result calculated...", threadIndex); _doneEvent.Set(); } // Recursive method that calculates the Nth Fibonacci number. public int Calculate(int n) { if (n <= 1) { return n; } return Calculate(n - 1) + Calculate(n - 2); } public int N { get { return _n; } } private int _n; public int FibOfN { get { return _fibOfN; } } private int _fibOfN; private ManualResetEvent _doneEvent; } public class ThreadPoolExample { static void Main() { const int FibonacciCalculations = 10; // One event is used for each Fibonacci object ManualResetEvent[] doneEvents = new ManualResetEvent[FibonacciCalculations]; Fibonacci[] fibArray = new Fibonacci[FibonacciCalculations]; Random r = new Random(); // Configure and launch threads using ThreadPool: Console.WriteLine("launching {0} tasks...", FibonacciCalculations); for (int i = 0; i < FibonacciCalculations; i++) { doneEvents[i] = new ManualResetEvent(false); Fibonacci f = new Fibonacci(r.Next(20,40), doneEvents[i]); fibArray[i] = f; ThreadPool.QueueUserWorkItem(f.ThreadPoolCallback, i); } // Wait for all threads in pool to calculation... WaitHandle.WaitAll(doneEvents); Console.WriteLine("All calculations are complete."); // Display the results... for (int i= 0; i<FibonacciCalculations; i++) { Fibonacci f = fibArray[i]; Console.WriteLine("Fibonacci({0}) = {1}", f.N, f.FibOfN); } } } </code></pre>

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