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    <p>.NET already has a concept of a <a href="http://msdn.microsoft.com/en-us/library/system.threading.synchronizationcontext.aspx" rel="nofollow"><code>SynchronizationContext</code></a>, most often used for UI apps where thread affinity is required to invoke operations on UI controls (e.g. in WPF or WinForms). However, even outside a UI app, you can reuse these concepts for a general purpose thread-affinitized work queue.</p> <p>This sample shows how to use the WPF <a href="http://msdn.microsoft.com/en-us/library/system.windows.threading.dispatchersynchronizationcontext.aspx" rel="nofollow"><code>DispatcherSynchronizationContext</code></a> (from <code>WindowsBase.dll</code>) in a simple console application, together with the .NET 4.0 task classes (<a href="http://msdn.microsoft.com/en-us/library/system.threading.tasks.taskscheduler.aspx" rel="nofollow"><code>TaskScheduler</code></a> / <a href="http://msdn.microsoft.com/en-us/library/system.threading.tasks.task.aspx" rel="nofollow"><code>Task</code></a>) to invoke actions originating on child threads back on the main program thread.</p> <pre><code>using System; using System.Threading; using System.Threading.Tasks; using System.Windows.Threading; internal sealed class Program { private static void Main(string[] args) { int threadCount = 2; using (ThreadData data = new ThreadData(threadCount)) { Thread[] threads = new Thread[threadCount]; for (int i = 0; i &lt; threadCount; ++i) { threads[i] = new Thread(DoOperations); } foreach (Thread thread in threads) { thread.Start(data); } Console.WriteLine("Starting..."); // Start and wait here while all work is dispatched. data.RunDispatcher(); } // Dispatcher has exited. Console.WriteLine("Shutdown."); } private static void DoOperations(object objData) { ThreadData data = (ThreadData)objData; try { // Start scheduling operations from child thread. for (int i = 0; i &lt; 5; ++i) { int t = Thread.CurrentThread.ManagedThreadId; int n = i; data.ExecuteTask(() =&gt; SayHello(t, n)); } } finally { // Child thread is done. data.OnThreadCompleted(); } } private static void SayHello(int requestingThreadId, int operationNumber) { Console.WriteLine( "Saying hello from thread {0} ({1}) on thread {2}.", requestingThreadId, operationNumber, Thread.CurrentThread.ManagedThreadId); } private sealed class ThreadData : IDisposable { private readonly Dispatcher dispatcher; private readonly TaskScheduler scheduler; private readonly TaskFactory factory; private readonly CountdownEvent countdownEvent; // In this example, we initialize the countdown event with the total number // of child threads so that we know when all threads are finished scheduling // work. public ThreadData(int threadCount) { this.dispatcher = Dispatcher.CurrentDispatcher; SynchronizationContext context = new DispatcherSynchronizationContext(this.dispatcher); SynchronizationContext.SetSynchronizationContext(context); this.scheduler = TaskScheduler.FromCurrentSynchronizationContext(); this.factory = new TaskFactory(this.scheduler); this.countdownEvent = new CountdownEvent(threadCount); } // This method should be called by a child thread when it wants to invoke // an operation back on the main dispatcher thread. This will block until // the method is done executing. public void ExecuteTask(Action action) { Task task = this.factory.StartNew(action); task.Wait(); } // This method should be called by threads when they are done // scheduling work. public void OnThreadCompleted() { bool allThreadsFinished = this.countdownEvent.Signal(); if (allThreadsFinished) { this.dispatcher.InvokeShutdown(); } } // This method should be called by the main thread so that it will begin // processing the work scheduled by child threads. It will return when // the dispatcher is shutdown. public void RunDispatcher() { Dispatcher.Run(); } public void Dispose() { this.Dispose(true); GC.SuppressFinalize(this); } // Dispose all IDisposable resources. private void Dispose(bool disposing) { if (disposing) { this.countdownEvent.Dispose(); } } } } </code></pre> <p>Sample output:</p> <pre> Starting... Saying hello from thread 3 (0) on thread 1. Saying hello from thread 4 (0) on thread 1. Saying hello from thread 3 (1) on thread 1. Saying hello from thread 4 (1) on thread 1. Saying hello from thread 3 (2) on thread 1. Saying hello from thread 4 (2) on thread 1. Saying hello from thread 3 (3) on thread 1. Saying hello from thread 4 (3) on thread 1. Saying hello from thread 3 (4) on thread 1. Saying hello from thread 4 (4) on thread 1. Shutdown. </pre>
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Guidance
A row detail

Detail views are divided into sections. All the information in the data section comes from columns in the selected row. The other sections display data from other, related rows.

Related data can be related in a to-one or a to-many fashion. Captions of data related in a to-many fashion link to a list view showing a filtered view of the table.

Try moving around until you find a non-empty to-many entry and click on the label to get to one. You can move back to the root by clicking on the database name in the header.

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