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Monitor.TryEnter Method (Object, Int32)

.NET Framework 4.5

Attempts, for the specified number of milliseconds, to acquire an exclusive lock on the specified object.

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

public static bool TryEnter(
	Object obj,
	int millisecondsTimeout
)

Parameters

obj: Type: System.Object
The object on which to acquire the lock.

millisecondsTimeout: Type: System.Int32
The number of milliseconds to wait for the lock.

Return Value

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

Exceptions

Exception	Condition
ArgumentNullException	The obj parameter is null.
ArgumentOutOfRangeException	millisecondsTimeout is negative, and not equal to Infinite.

Remarks

If the millisecondsTimeout parameter equals Infinite, this method is equivalent to Enter. If millisecondsTimeout equals 0, this method is equivalent to TryEnter.

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

Version Information

.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

Platforms

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.

Reference

Monitor Class

TryEnter Overload

System.Threading Namespace

Thread

Other Resources

Managed Threading

Monitors

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