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Monitor.TryEnter Method (Object)

Attempts to acquire an exclusive lock on the specified object.

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

static member TryEnter : 
        obj:Object -> bool

Parameters

obj
Type: System.Object

The object on which to acquire the lock.

Return Value

Type: System.Boolean
true if the current thread acquires the lock; otherwise, false.

ExceptionCondition
ArgumentNullException

The obj parameter is a null reference (Nothing in Visual Basic).

If successful, this method acquires an exclusive lock on the obj parameter. This method returns immediately, whether or not the lock is available.

This method is similar to Enter, but it will never block. If the thread cannot enter without blocking, the method returns false, and the thread does not enter the critical section.

NoteNote

Use Monitor to lock objects (that is, reference types), not value types. For details, see Enter and the conceptual topic Monitors.

The following code example demonstrates how to use the TryEnter method.

No code example is currently available or this language may not be supported.

.NET Framework

Supported in: 4.5, 4, 3.5, 3.0, 2.0, 1.1, 1.0

.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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