Problem: Application.vshost.exe in VS2008 may get corrupted

Source: Microsoft Support

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Problem:













When debugging a VS 2008 application running on framework 2.0 or 3.5, pressing F5 can case this error message to be thrown:













Request for the permission of type ‘system.Security.Permissions.FileIOPermission, mscorlib, version-2.O.O.O, Culture=neutral, PublicKeyToken-b77a5c561934e069’ failed.

















            Even though the application was running from local machine and the project also on local machine with fulltrust.  If the application.exe is executed, it works fine.


 







 

  When debugging an application in VS 2008 by pressing F5 this error message might be thrown:





Request for the permission of type ‘system.Security.Permissions.FileIOPermission, mscorlib, version-2.O.O.O, Culture=neutral, PublicKeyToken-b77a5c561934e069’ failed.

The FileIOPermission exception is thrown due to a corrupted application.vshost.exe file generated from the debugger in the IDE. 

The issue can be resolved by unchecking the "Enable the Visual Studio hosting process" in the project properties, then rebuild the project and then re-enabling the VS hosting process and rebuilding the project. 

Project Properties->Debug-> uncheck "Enable the Visual Studio hosting process"

How to: Disable the Hosting Processhttp://msdn2.microsoft.com/en-us/library/ms185330.aspx (http://msdn2.microsoft.com/en-us/library/ms185330.aspx)

Hosting Process (vshost.exe)
http://msdn2.microsoft.com/en-us/library/ms185331.aspx (http://msdn2.microsoft.com/en-us/library/ms185331.aspx)

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