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    <p>The <a href="http://msdn.microsoft.com/en-us/library/system.windows.threading.dispatcher.aspx" rel="nofollow"><code>Dispatcher</code></a> is an object that models the message loop of WPF applications. If that doesn't mean anything to you then forget you ever heard of it.</p> <p><a href="http://msdn.microsoft.com/en-us/library/system.componentmodel.backgroundworker.aspx" rel="nofollow"><code>BackgroundWorker</code></a> is a convenience class over a thread that is part of the <a href="http://msdn.microsoft.com/en-us/library/0ka9477y.aspx" rel="nofollow">managed thread pool</a>. It exists to provide some commonly requested functionality over manually assigning work to the thread pool with <a href="http://msdn.microsoft.com/en-us/library/b2b9a8h2.aspx" rel="nofollow"><code>ThreadPool.QueueUserWorkItem</code></a>.</p> <p>The <a href="http://msdn.microsoft.com/en-us/library/system.threading.thread.aspx" rel="nofollow"><code>Thread</code></a> class is very much like using the managed thread pool, with the difference being that you are in absolute control of the thread's lifetime (on the flip side, it's worse than using the thread pool if you intend to launch lots of short tasks).</p> <p>The <a href="http://msdn.microsoft.com/en-us/library/dd460717.aspx" rel="nofollow">Task Parallel Library</a> (TPL) (i.e. using <code>Parallel.ForEach</code>) would indeed be the best approach, since it not only takes care of assigning work units to a number of threads (from the managed thread pool) but it will also automatically divide the work units among those threads.</p>
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    1. COSo for the example snippet in the OP, will the Parallel.ForEach create a thread for each of the entries in the URLsList? won't that be kind of a problem?
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    2. CO@Vlad: No, because a) it uses the managed thread pool (so typically no threads are created; sleeping threads are just woken up) and b) it only uses up to a specified number of threads (`MaxDegreeOfParalellism = ... `).
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    3. CONice, easy enough. Thanks!
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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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