How to: Make Code Groups Exclusive or Level Final
Optionally, using the .NET Framework Configuration tool (Mscorcfg.msc), you can make a code group exclusive or level final, as shown in the following instructions.
To make code groups exclusive or final using Mscorcfg.msc
Run the .NET Framework Configuration tool (Mscorcfg.msc).
In Control Panel, open Administrative Tools.
Double-click Microsoft .NET Framework <version> Configuration.
Alternatively, you can run the tool from a command prompt:
In the .NET Framework versions 1.0 and 1.1, type the following at the command prompt: %Systemroot%\Microsoft.NET\Framework\versionNumber\Mscorcfg.msc.
In the .NET Framework 2.0, start the SDK Command Prompt and type mscorcfg.msc.
Expand the Runtime Security Policy node.
Expand the node for the policy level that contains the code group you want to make exclusive or final.
Expand the Code Groups node, and then expand the tree under the All_code node.
Right-click the code group that you want to be exclusive or final and select Properties.
To make a code group exclusive, select the check box labeled "This policy level will only have the permissions from the permission set associated with this code group".
To make a code group level final, select the check box labeled "Policy levels below this level will not be evaluated".