Application attempted to perform an operation not allowed by the security policy RRS feed

  • Question

  • We have a program written in Visual Studio .Net 2003 that has been updated for years using that software.  We recently updated to Visual Studio 2008 and get the Application attempted... security policy error.  I am a fairly new programmer and I have never created a NEW program, just worked on old program problems.  I have installed and debugged the program to run great on debug and on my computer, but I cannot get it to deploy and hookup with our SqlServer using 2008.  Do I need to create a new install program?  I have upgraded the satellite computer to Framework 3.5.  Set Computer, Intranet and Internet all to Full Trust using the wizard in the Control Panel, held my mouth in all types of ways, but still cannot deploy our software to our network successfully.  Please help.
    Pat McLaughlin
    Monday, June 8, 2009 7:58 PM


  • Hi D. Pat McLaughlin,

    You can try creating a new project. However, you need to start from scratch for programming.

    I can understand that you encounter some problems when migrating your application from Visual Studio 2003 to Visual Studio 2008.

    As you know, Visual Studio 2003 targets .NET Framework 1.1 and Visual Studio 2008 targets .NET Framework 2.0, 3.0 or 3.5.
    .NET Framework 3.5 uses CLR version 2.0 and so does .NET Framework 2.0 or 3.0, while .NET framework 1.1 uses v1.1.
    The issue there is that: you are on a different CLR version (1.1) which has some changes compared to the CLR 2.0 (which is used by Fx 2.0/3.0/3.5).
    Here is a useful blog that sheds some light on this issue, see:

    If you're developing a web project, the following documents can provide you some good suggestions on migration.

    If you have any specific issue on migration, you can consult it on the specific forum to get more useful help.
    For VB.NET -  Visual Basic General forum
    For C# - Visual C# General forum
    For C++ - Visual C++ General forum
    For ASP.NET - ASP.NET forum
    For more forums, see:


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    Wednesday, June 10, 2009 7:56 AM