C# “Assembly.LoadFile” & disable “DllImport” in loaded assembly?

Question

In C#, Is it possible to dynamicaly load a .NET library at runtime with using something like System.Reflection.Assembly.LoadFile & disabling the loaded library from using [DllImport("someCPP.DLL", EntryPoint ="someFunction")] so that you can't call c++ stuff for security reasons??

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The reason for this question is i'm thinking about making a generic openSource browser plugin that could run any .NET code & display things like OpenGL or Direct3D or whatever content you want in the browser using .NET. This would need the loaded .NET library to be secure though by disabling "DllImport" & maybe some other things. Is this possible?

Answer 1

You can use an application domain with restricted security permissions.

Here is a general introduction to application domains:

• Application Domains (C# and Visual Basic)

And here is the specific permission related to executing unmanaged code:

• SecurityPermissionFlag.UnmanagedCode