Microsoft KB Archive/899511

= FIX: In the .NET Framework 1.1, you may randomly receive System.NullReferenceException exceptions when a Windows Forms application displays a modal dialog box in response to an event =

Article ID: 899511

Article Last Modified on 12/3/2007

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APPLIES TO


 * Microsoft .NET Framework 1.1
 * Microsoft .NET Framework 1.1 Service Pack 1
 * Microsoft Windows Server 2003, Datacenter Edition (32-bit x86)
 * Microsoft Windows Server 2003, Enterprise Edition (32-bit x86)
 * Microsoft Windows Server 2003, Standard Edition (32-bit x86)

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SYMPTOMS
In the Microsoft .NET Framework 1.1, you may randomly receive System.NullReferenceException exceptions in a Windows Forms application. This problem occurs when a Windows Forms application displays a modal dialog box in response to an event.

Note This problem is more prevalent on computers that are running in a Microsoft Windows Server 2003 Terminal Server environment.



Download information
The following file is available for download from the Microsoft Download Center:

Download the 237428_ENU_i386_zip.exe package or the 237718_ENU_i386_zip.exe package now.

Release Date: 6/20/2007

For more information about how to download Microsoft support files, click the following article number to view the article in the Microsoft Knowledge Base:

119591 How to obtain Microsoft support files from online services

Microsoft scanned this file for viruses. Microsoft used the most current virus-detection software that was available on the date that the file was posted. The file is stored on security-enhanced servers that help prevent any unauthorized changes to the file.

Hotfix information
A supported hotfix is now available from Microsoft, but it is only intended to correct the problem that is described in this article. Only apply it to systems that are experiencing this specific problem. This hotfix may receive additional testing. Therefore, if you are not severely affected by this problem, we recommend that you wait for the next .NET Framework 1.1 service pack that contains this hotfix.

To resolve this problem immediately, contact Microsoft Product Support Services to obtain the hotfix. For a complete list of Microsoft Product Support Services telephone numbers and information about support costs, visit the following Microsoft Web site:

http://support.microsoft.com/contactus/?ws=support

Note In special cases, charges that are ordinarily incurred for support calls may be canceled if a Microsoft Support Professional determines that a specific update will resolve your problem. The usual support costs will apply to additional support questions and issues that do not qualify for the specific update in question.

Prerequisites
To apply this hotfix, you must have the .NET Framework 1.1 Service Pack 1 (SP1) installed on the computer.

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 tool in Control Panel.   Date         Time   Version        Size       File name --  25-May-2005  06:03  1.1.4322.2327  2,056,192  System.windows.forms.dll



STATUS
Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the &quot;Applies to&quot; section.



MORE INFORMATION
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

Keywords: kbwinserv2003sp2fix kbfix kbbug kbpubtypekc kbqfe kbhotfixserver KB899511

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