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ReaderWriterLockSlim.IsWriteLockHeld Property

Gets a value that indicates whether the current thread has entered the lock in write mode.

Namespace:  System.Threading
Assembly:  System.Core (in System.Core.dll)

public bool IsWriteLockHeld { get; }

Property Value

Type: System.Boolean
true if the current thread has entered write mode; otherwise, false.

This property is intended for use in asserts or for other debugging purposes. Do not use it to control the flow of program execution.

The following example shows how to use the IsWriteLockHeld property to generate an assert if the current thread has entered write mode unexpectedly.

using (ReaderWriterLockSlim rwLock = new ReaderWriterLockSlim()) {


    String.Format("Thread {0} is still holding the write lock after MyFunction has finished.", 

.NET Framework

Supported in: 4.5, 4, 3.5

.NET Framework Client Profile

Supported in: 4, 3.5 SP1

Portable Class Library

Supported in: Portable Class Library

.NET for Windows Store apps

Supported in: Windows 8

.NET for Windows Phone apps

Supported in: Windows Phone 8.1, Windows Phone Silverlight 8.1, Windows Phone Silverlight 8

Windows Phone 8.1, Windows Phone 8, Windows 8.1, Windows Server 2012 R2, Windows 8, Windows Server 2012, Windows 7, Windows Vista SP2, Windows Server 2008 (Server Core Role not supported), Windows Server 2008 R2 (Server Core Role supported with SP1 or later; Itanium not supported)

The .NET Framework does not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.

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