ReaderWriterLockSlim.IsUpgradeableReadLockHeld Property

Reference

Definition

Namespace:: System.Threading

Assemblies:: System.Core.dll, System.Threading.dll

Assemblies:: netstandard.dll, System.Threading.dll

Assembly:: System.Threading.dll

Assembly:: System.Core.dll

Assembly:: netstandard.dll

Source:: ReaderWriterLockSlim.cs

Source:: ReaderWriterLockSlim.cs

Source:: ReaderWriterLockSlim.cs

Important

Some information relates to prerelease product that may be substantially modified before it’s released. Microsoft makes no warranties, express or implied, with respect to the information provided here.

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

public:
 property bool IsUpgradeableReadLockHeld { bool get(); };

public bool IsUpgradeableReadLockHeld { get; }

member this.IsUpgradeableReadLockHeld : bool

Public ReadOnly Property IsUpgradeableReadLockHeld As Boolean

Property Value

Boolean

true if the current thread has entered upgradeable mode; otherwise, false.

Examples

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

using (ReaderWriterLockSlim rwLock = new ReaderWriterLockSlim()) {

Using rwLock As New ReaderWriterLockSlim()

Debug.Assert(!rwLock.IsUpgradeableReadLockHeld,
    String.Format("Thread {0} has entered the upgradeable read lock while MyFunction is still executing.",
                  Thread.CurrentThread.ManagedThreadId));

Debug.Assert(Not rwLock.IsUpgradeableReadLockHeld, _
    String.Format("Thread {0} has entered the upgradeable read lock while MyFunction is still executing.", _
                  Thread.CurrentThread.ManagedThreadId))

Remarks

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

Applies to

Product	Versions
.NET	Core 1.0, Core 1.1, Core 2.0, Core 2.1, Core 2.2, Core 3.0, Core 3.1, 5, 6, 7, 8, 9, 10
.NET Framework	3.5, 4.0, 4.5, 4.5.1, 4.5.2, 4.6, 4.6.1, 4.6.2, 4.7, 4.7.1, 4.7.2, 4.8, 4.8.1
.NET Standard	1.0, 1.1, 1.2, 1.3, 1.4, 1.6, 2.0, 2.1
UWP	10.0

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