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FIX: A System.OutOfMemoryException exception occurs or the IDE responds slowly after you build a solution that contains many WPF projects several times by using the .NET Framework 3.5 SP1

You build a complex solution that contains many Windows Presentation Foundation (WPF) projects that are based on the Microsoft .NET Framework 3.5 Service Pack 1 (SP1). Every time that you build the solution, the memory usage of the devenv.exe process increases. After you build the solution several times, you encounter one or more of the following problems:
  • You receive a System.OutOfMemoryException exception. Then, you receive the following error message:
    Exception of type "System.OutOfMemoryException" was thrown.
  • When you click any button that is in the IDE, the IDE responds slowly and even crashes.

    Note This problem occurs even when you do not open XAML files.
This problem occurs because memory fragmentation occurs between the .NET Framework class library and the XAML parser.

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 the problem described in this article. 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.

If the hotfix is available for download, there is a "Hotfix download available" section at the top of this Knowledge Base article. If this section does not appear, contact Microsoft Customer Service and Support to obtain the hotfix.

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: Note The "Hotfix download available" form displays the languages for which the hotfix is available. If you do not see your language, it is because a hotfix is not available for that language.


You must have the .NET Framework 3.5 SP1 installed to apply this hotfix.

Restart requirement

You do not have to restart the computer after you apply this hotfix if no instance of the .NET Framework is being used.

Hotfix replacement information

This hotfix does not replace 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.
For all supported x86-based versions of Windows Server 2000, of Windows Server 2003, and of Windows XP
File nameFile versionFile sizeDateTimePlatform
Presentationbuildtasks.dll3.0.6920.4010598,01622-Oct- 200923:45x86
Presentationcore.dll3.0.6920.40104,214,78422-Oct- 200923:57x86
Presentationframework.dll3.0.6920.40105,279,74422-Oct- 200923:49x86
Windowsbase.dll3.0.6920.40101,245,18422-Oct- 200923:57x86

For all supported x64-based versions of Windows Server 2000, of Windows Server 2003, and of Windows XP
File nameFile versionFile sizeDateTimePlatform
Presentationbuildtasks.dll3.0.6920.4010598,01622-Oct- 200923:45x64
Presentationcore.dll3.0.6920.40103,996,67222-Oct- 200923:08x64
Presentationframework.dll3.0.6920.40104,636,67222-Oct- 200923:01x64
Windowsbase.dll3.0.6920.40101,105,92022-Oct- 200923:08x64

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

Article ID: 976117 - Last Review: 10/07/2011 15:31:00 - Revision: 2.0

Microsoft .NET Framework 3.5 Service Pack 1

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