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ExecutionContext.SuppressFlow Method

Suppresses the flow of the execution context across asynchronous threads.

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

public static AsyncFlowControl SuppressFlow ()
public static AsyncFlowControl SuppressFlow ()
public static function SuppressFlow () : AsyncFlowControl
Not applicable.

Return Value

An AsyncFlowControl structure for restoring the flow.

Exception typeCondition

InvalidOperationException

The context flow is already suppressed.

Use this method to suppress the flow of the ExecutionContext on the current thread.

You must use the Undo method on the returned AsyncFlowControl structure to restore the flow of the ExecutionContext.

This method is protected with a SecurityAction.LinkDemand for SecurityPermissionFlag.Infrastructure permission. A fully trusted component can call this method to suppress the flow of the ExecutionContext during asynchronous calls. While the flow is suppressed, the Capture method returns a null reference (Nothing in Visual Basic).

The following code example shows the use of the SuppressFlow method. This example is part of a larger example provided for the ExecutionContext class.

Console.WriteLine("Suppress the flow of the execution context.");
AsyncFlowControl aFC = ExecutionContext.SuppressFlow();

  • SecurityPermission  for operating with infrastructure code. Demand value: SecurityAction.LinkDemand; Permission value: SecurityPermissionFlag.Infrastructure

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

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