VolatileWrite Method (SByte, SByte)

Thread.VolatileWrite Method (SByte, SByte)

Writes a value to a field immediately, so that the value is visible to all processors in the computer.

This method is not CLS-compliant.  

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

public static void VolatileWrite (
	ref sbyte address,
	sbyte value
/** @attribute CLSCompliantAttribute(false) */ 
public static void VolatileWrite (
	/** @ref */ SByte address, 
	SByte value
JScript does not support passing value-type arguments by reference.



The field to which the value is to be written.


The value to be written.

VolatileRead and VolatileWrite are for special cases of synchronization. Under normal circumstances, the C# lock statement, the Visual Basic SyncLock statement, and the Monitor class provide easier alternatives.

On a multiprocessor system, VolatileWrite ensures that a value written to a memory location is immediately visible to all processors. This might require flushing processor caches.

Even on a uniprocessor system, VolatileRead and VolatileWrite ensure that a value is read or written to memory, and not cached (for example, in a processor register). Thus, you can use them to synchronize access to a field that can be updated by another thread, or by hardware.

Calling this method affects only a single memory access. To provide effective synchronization for a field, all access to the field must use VolatileRead or VolatileWrite.


In C#, using the volatile modifier on a field guarantees that all access to that field uses VolatileRead or VolatileWrite.

Windows 98, Windows 2000 SP4, Windows Millennium Edition, Windows Server 2003, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP SP2, Windows XP Starter Edition

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

.NET Framework

Supported in: 2.0, 1.1

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