ReaderWriterLockSlim.CurrentReadCount Property


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Gets the total number of unique threads that have entered the lock in read mode.

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

public int CurrentReadCount { get; }

Property Value

Type: System.Int32

The number of unique threads that have entered the lock in read mode.

A thread is counted only once, even if the lock allows recursion and the thread has entered read mode multiple times.

Use this property only for debugging, profiling, and logging purposes, and not to control the behavior of an algorithm. The results can change as soon as they have been calculated. Therefore, it is not safe to make decisions based on this property.

The following example shows how to use the CurrentReadCount property to generate an event log entry if the number of threads in read mode exceeds a threshold.

using (ReaderWriterLockSlim rwLock = new ReaderWriterLockSlim()) {
if (!EventLog.SourceExists("MySource"))
    EventLog.CreateEventSource("MySource", "MyPerformanceLog");
EventLog performanceLog = new EventLog();
performanceLog.Source = "MySource";
int readCt = rwLock.CurrentReadCount;
if (readCt > READ_THRESHOLD)
        "{0} reader threads; exceeds recommended maximum.", readCt));

Universal Windows Platform
Available since 8
.NET Framework
Available since 3.5
Portable Class Library
Supported in: portable .NET platforms
Windows Phone Silverlight
Available since 8.0
Windows Phone
Available since 8.1
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