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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 R2Article ID: 977866 - View products that this article applies to. On This PageSYMPTOMSIn 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. CAUSEThe 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. RESOLUTIONHotfix informationA 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: http://support.microsoft.com/contactus/?ws=support 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.
(http://support.microsoft.com/contactus/?ws=support)
PrerequisitesTo 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 requirementYou do not have to restart the computer after you apply this hotfix if no instance of Microsoft Visual Basic is being used.Hotfix replacement informationThis hotfix does not replace other hotfixes.File informationThe 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 R2Collapse this table
For all supported x64-based versions of Windows 7 and of Windows Server 2008 R2Collapse this table
For all supported IA-64-based versions of Windows Server 2008 R2Collapse this table
STATUSMicrosoft
has confirmed that this is a problem in the Microsoft products that are listed
in the "Applies to" section. MORE INFORMATIONFor 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: http://msdn.microsoft.com/en-us/library/ms364059(VS.80).aspx
(http://msdn.microsoft.com/en-us/library/ms364059(VS.80).aspx)
PropertiesArticle ID: 977866 - Last Review: October 7, 2011 - Revision: 2.0
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