title

ms.custom

ms.date

ms.prod

ms.reviewer

ms.suite

ms.technology

ms.tgt_pltfrm

ms.topic

helpviewer_keywords

ms.assetid

caps.latest.revision

author

ms.author

manager

ManualResetEvent and ManualResetEventSlim

03/30/2017

.net

dotnet-standard

article

threading [.NET Framework], ManualResetEvent class

ManualResetEvent class, about ManualResetEvent class

465fdcf9-ba24-4d8d-a43f-d983b7cb0cc6

rpetrusha

ronpet

wpickett

ManualResetEvent and ManualResetEventSlim

The xref:System.Threading.ManualResetEvent?displayProperty=nameWithType class represents a local wait handle event that must be reset manually after it is signaled. This class represents a special case of its base class, xref:System.Threading.EventWaitHandle?displayProperty=nameWithType. See the EventWaitHandle conceptual documentation for the use and features of manual reset events.

A xref:System.Threading.ManualResetEvent object remains signaled until its xref:System.Threading.EventWaitHandle.Reset%2A?displayProperty=nameWithType method is called. Any number of waiting threads, or threads that wait on the event after it has been signaled, can be released while the object's state is signaled. xref:System.Threading.ManualResetEvent corresponds to a Win32 CreateEvent call, specifying true for the bManualReset argument.

In the [!INCLUDEnet_v40_long], you can use the xref:System.Threading.ManualResetEventSlim?displayProperty=nameWithType class for better performance when wait times are expected to be very short, and when the event does not cross a process boundary. xref:System.Threading.ManualResetEventSlim uses busy spinning for a short time while it waits for the event to become signaled. When wait times are short, spinning can be much less expensive than waiting by using wait handles. However, if the event does not become signaled within a certain period of time, xref:System.Threading.ManualResetEventSlim resorts to a regular event handle wait.

dotnet/docs

ManualResetEvent and ManualResetEventSlim

See Also