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ThreadStaticAttribute Class

Indicates that the value of a static field is unique for each thread.

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

[SerializableAttribute] 
[ComVisibleAttribute(true)] 
[AttributeUsageAttribute(AttributeTargets.Field, Inherited=false)] 
public class ThreadStaticAttribute : Attribute
/** @attribute SerializableAttribute() */ 
/** @attribute ComVisibleAttribute(true) */ 
/** @attribute AttributeUsageAttribute(AttributeTargets.Field, Inherited=false) */ 
public class ThreadStaticAttribute extends Attribute
SerializableAttribute 
ComVisibleAttribute(true) 
AttributeUsageAttribute(AttributeTargets.Field, Inherited=false) 
public class ThreadStaticAttribute extends Attribute
Not applicable.

A static field marked with ThreadStaticAttribute is not shared between threads. Each executing thread has a separate instance of the field, and independently sets and gets values for that field. If the field is accessed on a different thread, it will contain a different value.

NoteNote:

Do not specify initial values for fields marked with ThreadStaticAttribute, because such initialization occurs only once, when the class constructor executes, and therefore affects only one thread. If you do not specify an initial value, you can rely on the field being initialized to its default value if it is a value type, or to a null reference (Nothing in Visual Basic) if it is a reference type.

Use this attribute as it is, and do not derive from it. The following is an example of ThreadStaticAttribute syntax:

 [ThreadStatic]
 static int value;
 <ThreadStatic> _
 Shared value As Integer

For more information about using attributes, see [<topic://cpconExtendingMetadataUsingAttributes>].

System.Object
   System.Attribute
    System.ThreadStaticAttribute

Any public static (Shared in Visual Basic) members of this type are thread safe. Any instance members are not guaranteed to be thread safe.

Windows 98, Windows Server 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 Microsoft .NET Framework 3.0 is supported on Windows Vista, Microsoft Windows XP SP2, and Windows Server 2003 SP1.

.NET Framework

Supported in: 3.0, 2.0, 1.1, 1.0

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