Microsoft documents that code-access security should not be used as a security boundary: https://docs.microsoft.com/en-us/dotnet/framework/misc/code-access-sec

Microsoft documents that code-access security should not be used as a security boundary: https://docs.microsoft.com/en-us/dotnet/framework/misc/code-access-security https://docs.microsoft.com/en-us/dotnet/framework/misc/code-... As others in this thread have mentioned, CAS does not even exist in .NET Core and .NET 5.