How to determine whether a DLL is a managed assembly or native (prevent loading a native dll)?

Question

Original title: How can I prevent loading a native dll from a .NET app?

Background:

My C# application includes a plugin framework and gene

Answer 1

Using BadImageFormatException exception is a bad way to go, for ex. if your application targets .NET 3.5, it will not recognize let's say assemblies compiled against .NET Core, though the assembly is managed.

So I think parsing PE header is much better.