ThreadPool.QueueUserWorkItem Method (System.Threading)

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.NET Framework Class Library

ThreadPool.QueueUserWorkItem Method

Queues a method for execution. The method executes when a thread pool thread becomes available.

This member is overloaded. For complete information about this member, including syntax, usage, and examples, click a name in the overload list.

Overload List

	Name	Description
	QueueUserWorkItem(WaitCallback)	Queues a method for execution. The method executes when a thread pool thread becomes available.
	QueueUserWorkItem(WaitCallback, Object)	Queues a method for execution, and specifies an object containing data to be used by the method. The method executes when a thread pool thread becomes available.

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Reference

ThreadPool Class

System.Threading Namespace

Community Content

honeyp0t

re: exceptions

@Tristan2 New exceptions will be thrown until your code crashes.

Tristan2

Exceptions?

When an unhandled exception is thrown from code that was called by QueueUserWorkItem, what happens? How does QueueUserWorkItem handle that exception?

F. Chapleau

Example

private void StartAsync() $0{$0 $0Object state = new Object();$0 $0ThreadPool.QueueUserWorkItem(new WaitCallback(Refresh), state);$0 $0}$0 $0$0 $0 $0private void Refresh(object o)$0 $0{$0 $0// the state is o$0 $0}$0