FIX: You receive a System.ObjectDisposedException exception when you try to access a Stream object that is returned by the EndGetRequestStream method in the .NET Framework 2.0

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Article ID: 918462 - View products that this article applies to.
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SYMPTOMS

Consider the following scenario. In the Microsoft .NET Framework 2.0, you use the BeginGetRequestStream method and the EndGetRequestStream method in the HttpWebRequest class to complete an asynchronous HTTP request. In this scenario, when you try to access the Stream object that is returned by the EndGetRequestStream method, you receive a System.ObjectDisposedException exception.

Note This problem only occurs if you set the Method property in the HttpWebRequest class to a protocol property that uploads data. For example, you set the Method property to POST.

CAUSE

This problem occurs when the Web server resets or closes the connection after the client application sends the HTTP header. The HttpWebRequest class automatically tries to reopen a connection to the Web server to complete the transfer. When the transfer is successful, the EndGetRequestStream method incorrectly returns the Stream object from the first failed connection attempt, instead of the Stream object from the successful connection attempt. When the client application tries to use this disposed Stream object, a System.ObjectDisposedException exception is thrown.

RESOLUTION

Hotfix information



A supported hotfix is available from Microsoft. However, this hotfix is intended to correct only the problem that is described in this article. Apply this hotfix only to systems that are experiencing this specific problem. This hotfix might receive additional testing. Therefore, if you are not severely affected by this problem, we recommend that you wait for the next software update that contains this hotfix.

To download this hotfix from the MSDN Code Gallery, visit the following Microsoft Web site:
http://code.msdn.microsoft.com/KB918462

Note The MSDN Code Gallery displays the languages for which the hotfix is available. If you do not see your language listed, it is because the Code Gallery resource page is not available for that language.

Note If additional issues occur or if any troubleshooting is required, you might have to create a separate service request. The usual support costs will apply to additional support questions and issues that do not qualify for this specific hotfix. For a complete list of Microsoft Customer Service and Support telephone numbers or to create a separate service request, visit the following Microsoft Web site:
http://support.microsoft.com/contactus/?ws=support

Prerequisites

You must have the .NET Framework 2.0 installed to apply this hotfix.

Restart requirement

You do not have to restart the computer after you apply this hotfix.

Hotfix replacement information

This hotfix does not replace any other hotfixes.

File information

The English version of this hotfix has the file attributes (or later file attributes) that are listed in the following table. The dates and times for these files are listed in Coordinated Universal Time (UTC). When you view the file information, it is converted to local time. To find the difference between UTC and local time, use the Time Zone tab in the Date and Time item in Control Panel.
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File nameFile versionFile sizeDateTime
System.dll2.0.50727.1093,018,75201-May-200621:15

STATUS

Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the "Applies to" section.

MORE INFORMATION

For more information about the HttpWebRequest class, visit the following Microsoft Developer Network (MSDN) Web site:
http://msdn2.microsoft.com/en-us/library/system.net.httpwebrequest.aspx
For more information about the System.ObjectDisposedException class, visit the following MSDN Web site:
http://msdn2.microsoft.com/en-us/library/system.objectdisposedexception.aspx
For more information, click the following article number to view the article in the Microsoft Knowledge Base:
824684 Description of the standard terminology that is used to describe Microsoft software updates

Properties

Article ID: 918462 - Last Review: September 28, 2011 - Revision: 2.0
APPLIES TO
  • Microsoft .NET Framework 2.0
Keywords: 
kbfix kbbug kbqfe KB918462

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