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11/18/2011

ObjectDisposedException Class

Microsoft Silverlight will reach end of support after October 2021. Learn more.

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

Inheritance Hierarchy

System.Object
  System.Exception
    System.SystemException
      System.InvalidOperationException
        System.ObjectDisposedException

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

Syntax

'Declaration
<ComVisibleAttribute(True)> _
Public Class ObjectDisposedException _
    Inherits InvalidOperationException

[ComVisibleAttribute(true)]
public class ObjectDisposedException : InvalidOperationException

The ObjectDisposedException type exposes the following members.

Constructors

	Name	Description
	ObjectDisposedException(String)	Initializes a new instance of the ObjectDisposedException class with a string containing the name of the disposed object.
	ObjectDisposedException(String, Exception)	Initializes a new instance of the ObjectDisposedException class with a specified error message and a reference to the inner exception that is the cause of this exception.
	ObjectDisposedException(String, String)	Initializes a new instance of the ObjectDisposedException class with the specified object name and message.

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Properties

	Name	Description
	Data	Gets a collection of key/value pairs that provide additional user-defined information about the exception. (Inherited from Exception.)
	HResult	Gets or sets HRESULT, a coded numerical value that is assigned to a specific exception. (Inherited from Exception.)
	InnerException	Gets the Exception instance that caused the current exception. (Inherited from Exception.)
	Message	Gets the message that describes the error. (Overrides Exception.Message.)
	ObjectName	Gets the name of the disposed object.
	StackTrace	Gets a string representation of the frames on the call stack at the time the current exception was thrown. (Inherited from Exception.)

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Methods

	Name	Description
	Equals(Object)	Determines whether the specified Object is equal to the current Object. (Inherited from Object.)
	Finalize	Allows an object to try to free resources and perform other cleanup operations before the Object is reclaimed by garbage collection. (Inherited from Object.)
	GetBaseException	When overridden in a derived class, returns the Exception that is the root cause of one or more subsequent exceptions. (Inherited from Exception.)
	GetHashCode	Serves as a hash function for a particular type. (Inherited from Object.)
	GetType	Gets the runtime type of the current instance. (Inherited from Exception.)
	MemberwiseClone	Creates a shallow copy of the current Object. (Inherited from Object.)
	ToString	Creates and returns a string representation of the current exception. (Inherited from Exception.)

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Examples

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

Note:
To run this example, see Building Examples That Use a Demo Method and a TextBlock Control.

Imports System.IO

Public Class Example

   Public Shared Sub Demo(ByVal outputBlock As System.Windows.Controls.TextBlock)
      Dim ms As New MemoryStream(16)
      ms.Close()
      Try
         ms.ReadByte()
      Catch e As ObjectDisposedException
         outputBlock.Text += String.Format("Caught: {0}", e.Message) & vbCrLf
      End Try
   End Sub 'Main
End Class 'ObjectDisposedExceptionTest

using System;
using System.IO;

public class Example
{
   public static void Demo(System.Windows.Controls.TextBlock outputBlock)
   {
      MemoryStream ms = new MemoryStream(16);
      ms.Close();
      try
      {
         ms.ReadByte();
      }
      catch (ObjectDisposedException e)
      {
         outputBlock.Text += String.Format("Caught: {0}", e.Message) + "\n";
      }
   }
}

This code produces the following output:

Caught:
  Cannot access a closed Stream.

Version Information

Silverlight

Supported in: 5, 4, 3

Silverlight for Windows Phone

Supported in: Windows Phone OS 7.1, Windows Phone OS 7.0

XNA Framework

Supported in: Xbox 360, Windows Phone OS 7.0

Platforms

For a list of the operating systems and browsers that are supported by Silverlight, see Supported Operating Systems and Browsers.

Thread Safety

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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