C# - ThreadPool.QueueUserWorkItem Causes App To Hang Until Finished?

Dec 10, 2010

This may be due to a lack of understanding of what's going on under the hood or simply a lack of understanding of threading in general. When a user logins I need to run some tasks that call web services to update data in my system. Since the services could take a considerable amount of time I thread the entire process. However, even though I think I'm running the whole series of tasks in a thread separate from my application, my application waits until the called function is finished before it proceeds.

WindowsIdentity identity = WindowsIdentity.GetCurrent();
Manager manager = (Manager)Session["Manager"];

ThreadPool.QueueUserWorkItem(new SafeWaitCallback().Call(identity, delegate(object noCallBack)
{
manager.RunAccountUpdater(identity);
}));

The application hangs until the function "RunAccountUpdater" is finished and the callback occurs. What am I doing wrong/not understanding?

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