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ObjectDisposedException Class

The exception that is thrown when an operation is performed on a disposed object.

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

'Declaration
<SerializableAttribute> _
<ComVisibleAttribute(True)> _
Public Class ObjectDisposedException
	Inherits InvalidOperationException
'Usage
Dim instance As ObjectDisposedException

/** @attribute SerializableAttribute() */ 
/** @attribute ComVisibleAttribute(true) */ 
public class ObjectDisposedException extends InvalidOperationException
SerializableAttribute 
ComVisibleAttribute(true) 
public class ObjectDisposedException extends InvalidOperationException

The following example demonstrates an error that causes the ObjectDisposedException exception to be thrown.

Imports System
Imports System.IO

Public Class ObjectDisposedExceptionTest
   
   Public Shared Sub Main()
      Dim ms As New MemoryStream(16)
      ms.Close()
      Try
         ms.ReadByte()
      Catch e As ObjectDisposedException
         Console.WriteLine("Caught: {0}", e.Message)
      End Try
   End Sub 'Main
End Class 'ObjectDisposedExceptionTest

import System.*;  
import System.IO.*;

public class ObjectDisposedExceptionTest
{
    public static void main(String[] args)
    {
        MemoryStream ms = new MemoryStream(16);
        ms.Close();
        try {
            ms.ReadByte();
        }
        catch (ObjectDisposedException e) {
            Console.WriteLine("Caught: {0}", e.get_Message());
        }
    } //main
} //ObjectDisposedExceptionTest

This code produces the following output:

Caught:
  Cannot access a closed Stream.
System.Object
   System.Exception
     System.SystemException
       System.InvalidOperationException
        System.ObjectDisposedException
Any public static (Shared in Visual Basic) members of this type are thread safe. Any instance members are not guaranteed to be thread safe.

Windows 98, Windows 2000 SP4, Windows CE, Windows Millennium Edition, Windows Mobile for Pocket PC, Windows Mobile for Smartphone, Windows Server 2003, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP SP2, Windows XP Starter Edition

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

.NET Framework

Supported in: 2.0, 1.1, 1.0

.NET Compact Framework

Supported in: 2.0, 1.0
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