Thread.Resume Method (System.Threading)

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.NET Framework Class Library

Thread.Resume Method

Note: This API is now obsolete.

Resumes a thread that has been suspended.

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

Syntax

Visual Basic

<ObsoleteAttribute("Thread.Resume has been deprecated.  Please use other classes in System.Threading, such as Monitor, Mutex, Event, and Semaphore, to synchronize Threads or protect resources.  http://go.microsoft.com/fwlink/?linkid=14202",  _
	False)> _
<SecurityPermissionAttribute(SecurityAction.Demand, ControlThread := True)> _
Public Sub Resume

[ObsoleteAttribute("Thread.Resume has been deprecated.  Please use other classes in System.Threading, such as Monitor, Mutex, Event, and Semaphore, to synchronize Threads or protect resources.  http://go.microsoft.com/fwlink/?linkid=14202", 
	false)]
[SecurityPermissionAttribute(SecurityAction.Demand, ControlThread = true)]
public void Resume()

Visual C++

[ObsoleteAttribute(L"Thread.Resume has been deprecated.  Please use other classes in System.Threading, such as Monitor, Mutex, Event, and Semaphore, to synchronize Threads or protect resources.  http://go.microsoft.com/fwlink/?linkid=14202", 
	false)]
[SecurityPermissionAttribute(SecurityAction::Demand, ControlThread = true)]
public:
void Resume()

[<ObsoleteAttribute("Thread.Resume has been deprecated.  Please use other classes in System.Threading, such as Monitor, Mutex, Event, and Semaphore, to synchronize Threads or protect resources.  http://go.microsoft.com/fwlink/?linkid=14202", 
    false)>]
[<SecurityPermissionAttribute(SecurityAction.Demand, ControlThread = true)>]
member Resume : unit -> unit

Exceptions

Exception	Condition
ThreadStateException	The thread has not been started, is dead, or is not in the suspended state.
SecurityException	The caller does not have the appropriate SecurityPermission.

Remarks

Caution
Do not use the Suspend and Resume methods to synchronize the activities of threads. You have no way of knowing what code a thread is executing when you suspend it. If you suspend a thread while it holds locks during a security permission evaluation, other threads in the AppDomain might be blocked. If you suspend a thread while it is executing a class constructor, other threads in the AppDomain that attempt to use that class are blocked. Deadlocks can occur very easily.

Caution

Do not use the Suspend and Resume methods to synchronize the activities of threads. You have no way of knowing what code a thread is executing when you suspend it. If you suspend a thread while it holds locks during a security permission evaluation, other threads in the AppDomain might be blocked. If you suspend a thread while it is executing a class constructor, other threads in the AppDomain that attempt to use that class are blocked. Deadlocks can occur very easily.

Version Information

.NET Framework

Supported in: 1.1, 1.0
Obsolete (compiler warning) in 4
Obsolete (compiler warning) in 3.5
Obsolete (compiler warning) in 3.5 SP1
Obsolete (compiler warning) in 3.0
Obsolete (compiler warning) in 3.0 SP1
Obsolete (compiler warning) in 3.0 SP2
Obsolete (compiler warning) in 2.0
Obsolete (compiler warning) in 2.0 SP1
Obsolete (compiler warning) in 2.0 SP2

.NET Framework Client Profile

Obsolete (compiler warning) in 4
Obsolete (compiler warning) in 3.5 SP1

.NET Framework Security

SecurityPermission
for advanced operations on threads. Associated enumeration: SecurityPermissionFlag.ControlThread

Platforms

Windows 7, Windows Vista SP1 or later, Windows XP SP3, Windows XP SP2 x64 Edition, Windows Server 2008 (Server Core not supported), Windows Server 2008 R2 (Server Core supported with SP1 or later), Windows Server 2003 SP2

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

Reference

Thread Class

System.Threading Namespace

Other Resources

Pausing and Resuming Threads

Managed Thread States