ThreadStateException Class

The exception that is thrown when a Thread is in an invalid ThreadState for the method call.

System.Object
  System.Exception
    System.SystemException
      System.Threading.ThreadStateException

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

[SerializableAttribute]
[ComVisibleAttribute(true)]
public class ThreadStateException : SystemException

The ThreadStateException type exposes the following members.

  NameDescription
Public methodSupported by the XNA FrameworkThreadStateException()Initializes a new instance of the ThreadStateException class with default properties.
Public methodSupported by the XNA FrameworkThreadStateException(String)Initializes a new instance of the ThreadStateException class with a specified error message.
Protected methodThreadStateException(SerializationInfo, StreamingContext)Initializes a new instance of the ThreadStateException class with serialized data.
Public methodSupported by the XNA FrameworkThreadStateException(String, Exception)Initializes a new instance of the ThreadStateException class with a specified error message and a reference to the inner exception that is the cause of this exception.
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  NameDescription
Public propertyDataGets a collection of key/value pairs that provide additional user-defined information about the exception. (Inherited from Exception.)
Public propertyHelpLinkGets or sets a link to the help file associated with this exception. (Inherited from Exception.)
Public propertySupported by the XNA FrameworkHResultGets or sets HRESULT, a coded numerical value that is assigned to a specific exception. (Inherited from Exception.)
Public propertySupported by the XNA FrameworkInnerExceptionGets the Exception instance that caused the current exception. (Inherited from Exception.)
Public propertySupported by the XNA FrameworkMessageGets a message that describes the current exception. (Inherited from Exception.)
Public propertySourceGets or sets the name of the application or the object that causes the error. (Inherited from Exception.)
Public propertySupported by the XNA FrameworkStackTraceGets a string representation of the immediate frames on the call stack. (Inherited from Exception.)
Public propertyTargetSiteGets the method that throws the current exception. (Inherited from Exception.)
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  NameDescription
Public methodSupported by the XNA FrameworkEquals(Object)Determines whether the specified object is equal to the current object. (Inherited from Object.)
Protected methodSupported by the XNA FrameworkFinalizeAllows an object to try to free resources and perform other cleanup operations before it is reclaimed by garbage collection. (Inherited from Object.)
Public methodSupported by the XNA FrameworkGetBaseExceptionWhen overridden in a derived class, returns the Exception that is the root cause of one or more subsequent exceptions. (Inherited from Exception.)
Public methodSupported by the XNA FrameworkGetHashCodeServes as the default hash function. (Inherited from Object.)
Public methodGetObjectDataWhen overridden in a derived class, sets the SerializationInfo with information about the exception. (Inherited from Exception.)
Public methodSupported by the XNA FrameworkGetType()Gets the runtime type of the current instance. (Inherited from Exception.)

In XNA Framework 3.0, this member is inherited from Object.GetType().
Protected methodSupported by the XNA FrameworkMemberwiseCloneCreates a shallow copy of the current Object. (Inherited from Object.)
Public methodSupported by the XNA FrameworkToStringCreates and returns a string representation of the current exception. (Inherited from Exception.)
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  NameDescription
Protected eventSerializeObjectStateOccurs when an exception is serialized to create an exception state object that contains serialized data about the exception. (Inherited from Exception.)
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Once a thread is created, it is in at least one of the ThreadState states until it terminates. ThreadStateException is thrown by methods that cannot perform the requested operation due to the current state of a thread. For example, trying to restart an aborted thread by calling Start on a thread that has terminated throws a ThreadStateException.

ThreadStateException uses the HRESULT COR_E_THREADSTATE, which has the value 0x80131520.

For a list of initial property values for an instance of ThreadStateException, see the ThreadStateException constructors.

The following example demonstrates an error that causes the system to throw a ThreadStateException.

using System;
using System.Threading;

public class ThreadWork 
{
public static void DoWork()
   {
   Console.WriteLine("Working thread..."); 
   }
}

class ThreadStateTest
{
public static void Main()
   {
   ThreadStart myThreadDelegate = new ThreadStart(ThreadWork.DoWork);
   Thread myThread = new Thread(myThreadDelegate);
   myThread.Start();
   Thread.Sleep(0);
   Console.WriteLine("In main. Attempting to restart myThread.");
   try 
      {
      myThread.Start();
      }
      catch(ThreadStateException e)
      {
      Console.WriteLine("Caught: {0}", e.Message);
      }
   }
}

This code produces the following output:

 In main. Attempting to restart myThread.
     Working thread...
     Caught: Thread is running or terminated. Cannot restart.

.NET Framework

Supported in: 4.5.3, 4, 3.5, 3.0, 2.0, 1.1, 1.0

.NET Framework Client Profile

Supported in: 4, 3.5 SP1

Supported in: Windows Phone 8.1

Supported in: Windows Phone Silverlight 8.1

Supported in: Windows Phone Silverlight 8

Windows Phone 8.1, Windows Phone 8, Windows 8.1, Windows Server 2012 R2, Windows 8, Windows Server 2012, Windows 7, Windows Vista SP2, Windows Server 2008 (Server Core Role not supported), Windows Server 2008 R2 (Server Core Role supported with SP1 or later; Itanium not supported)

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

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