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Timeout Class

Contains a constant used to specify an infinite amount of time. This class cannot be inherited.

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

<ComVisibleAttribute(True)> _
Public NotInheritable Class Timeout
You do not need to declare an instance of a static class in order to access its members.

The only member of this class, Infinite, is a constant used by methods that accept an integer timeout parameter, such as Thread.Sleep(Int32), Thread.Join(Int32), and ReaderWriterLock.AcquireReaderLock(Int32).

The following code example shows a thread going to sleep for an infinite time and subsequently being woken up.

Option Explicit
Option Strict

Imports System
Imports System.Security.Permissions
Imports System.Threading

<Assembly: SecurityPermissionAttribute(SecurityAction.RequestMinimum, _
    ControlThread := True)>

Public Class ThreadInterrupt

    <MTAThread> _
    Shared Sub Main()
        Dim stayAwake As New StayAwake()
        Dim newThread As New Thread(AddressOf stayAwake.ThreadMethod)

        ' The following line causes an exception to be thrown  
        ' in ThreadMethod if newThread is currently blocked 
        ' or becomes blocked in the future.
        Console.WriteLine("Main thread calls Interrupt on newThread.")

        ' Tell newThread to go to sleep.
        stayAwake.SleepSwitch = True 

        ' Wait for newThread to end.
    End Sub 

End Class 

Public Class StayAwake

    Dim sleepSwitchValue As Boolean = False 

    WriteOnly Property SleepSwitch As Boolean 
            sleepSwitchValue = Value
        End Set 
    End Property  

    Sub New()
    End Sub 

    Sub ThreadMethod()
        Console.WriteLine("newThread is executing ThreadMethod.")
        While Not sleepSwitchValue

            ' Use SpinWait instead of Sleep to demonstrate the  
            ' effect of calling Interrupt on a running thread.
        End While 
            Console.WriteLine("newThread going to sleep.")

            ' When newThread goes to sleep, it is immediately  
            ' woken up by a ThreadInterruptedException.
        Catch ex As ThreadInterruptedException
            Console.WriteLine("newThread cannot go to " & _
                "sleep - interrupted by main thread.")
        End Try 
    End Sub 

End Class


This type is thread safe.

Windows 7, Windows Vista, Windows XP SP2, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP Starter Edition, Windows Server 2008 R2, Windows Server 2008, Windows Server 2003, Windows Server 2000 SP4, Windows Millennium Edition, Windows 98, Windows CE, Windows Mobile for Smartphone, Windows Mobile for Pocket PC, Xbox 360, Zune

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

.NET Framework

Supported in: 3.5, 3.0, 2.0, 1.1, 1.0

.NET Compact Framework

Supported in: 3.5, 2.0, 1.0

XNA Framework

Supported in: 3.0, 2.0, 1.0

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