發行項
11/18/2011

SynchronizationContext Class

Microsoft Silverlight will reach end of support after October 2021. Learn more.

Provides the basic functionality for propagating a synchronization context in various synchronization models.

Inheritance Hierarchy

System.Object
System.Threading.SynchronizationContext
System.Windows.Threading.DispatcherSynchronizationContext

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

Syntax

'Declaration
Public Class SynchronizationContext

public class SynchronizationContext

The SynchronizationContext type exposes the following members.

Constructors

	Name	Description
	SynchronizationContext	Creates a new instance of the SynchronizationContext class.

Top

Properties

	Name	Description
	Current	Gets the synchronization context for the current thread.

Top

Methods

	Name	Description
	CreateCopy	When overridden in a derived class, creates a copy of the synchronization context.
	Equals(Object)	Determines whether the specified Object is equal to the current Object. (Inherited from Object.)
	Finalize	Allows an object to try to free resources and perform other cleanup operations before the Object is reclaimed by garbage collection. (Inherited from Object.)
	GetHashCode	Serves as a hash function for a particular type. (Inherited from Object.)
	GetType	Gets the Type of the current instance. (Inherited from Object.)
	MemberwiseClone	Creates a shallow copy of the current Object. (Inherited from Object.)
	OperationCompleted	When overridden in a derived class, responds to the notification that an operation has completed.
	OperationStarted	When overridden in a derived class, responds to the notification that an operation has started.
	Post	When overridden in a derived class, dispatches an asynchronous message to a synchronization context.
	Send	When overridden in a derived class, dispatches a synchronous message to a synchronization context.
	SetSynchronizationContext	Security Critical. Sets the current synchronization context.
	SetThreadStaticContext	Obsolete. Security Critical. Sets the current context for thread static data.
	ToString	Returns a string that represents the current object. (Inherited from Object.)

Top

Remarks

The SynchronizationContext class is a base class that provides a free-threaded context with no synchronization.

The purpose of the synchronization model implemented by this class is to allow the internal asynchronous/synchronization operations of the common language runtime to behave properly with different synchronization models. This model also simplifies some of the requirements that managed applications have had to follow in order to work correctly under different synchronization environments.

Providers of synchronization models can extend this class and provide their own implementations for these methods.

Version Information

Silverlight

Supported in: 5, 4, 3

Silverlight for Windows Phone

Supported in: Windows Phone OS 7.1, Windows Phone OS 7.0

XNA Framework

Supported in: Xbox 360, Windows Phone OS 7.0

Platforms

For a list of the operating systems and browsers that are supported by Silverlight, see Supported Operating Systems and Browsers.

Thread Safety

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

共用方式為