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FIX: You cannot run .NET Framework 3.5-based Entity Framework applications in a partial trust environment on a computer that is running Windows 7 Client or Windows Server 2008 R2

SYMPTOMS
In the Microsoft .NET Framework 3.5, you cannot run Entity Framework applications in a partial trust environment on a computer that is running Windows 7 Client or Windows Server 2008 R2.
CAUSE
The Entity Framework cannot be used in a partial trust environment because the framework requires UnmanagedCode permission. Typically, only full trust environments grant UnmanagedCode permission. Therefore, the Entity Framework cannot be used in common partial trust environments such as an ASP.NET medium trust environment.
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.

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, submit a request to 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.

Prerequisites

To apply this hotfix, you must have the .NET Framework 3.5 Service Pack 1 (SP1) installed on a computer that is running Windows 7 or Windows Server 2008 R2.

Restart requirement

You do not have to restart the computer after you apply this hotfix if no instance of Microsoft Visual Basic 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 7 and of Windows Server 2008 R2
File nameFile versionFile sizeDateTime
System.data.entity.dll3.5.30729.50012,879,48808-Dec-200923:47
For all supported x64-based versions of Windows 7 and of Windows Server 2008 R2
File nameFile versionFile sizeDateTime
System.data.entity.dll3.5.30729.50012,879,48809-Dec-200901:22
For all supported IA-64-based versions of Windows Server 2008 R2
File nameFile versionFile sizeDateTime
System.data.entity.dll3.5.30729.50012,879,48808-Dec-200923:45
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 programming for partial trust environments in the .NET Framework 3.5 SP1 or earlier verions of the .NET Framework, visit the following Microsoft Developer Network (MSDN) Web site:
Properties

Article ID: 977866 - Last Review: 10/07/2011 14:39:00 - Revision: 2.0

  • Microsoft .NET Framework 3.5 Service Pack 1
  • kbsurveynew kbqfe kbbug kbfix kbexpertiseadvanced KB977866
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