Question

I was wondering: can an interface inherit from another class?

I’m trying to let an interface inherit from the MarshalByRefObject.

My intent is that all classes implementing the interface also inherit from that class.

Answer 1

No, it cannot.
An interface can only specify other interfaces that must be implemented. This is done by using the same syntax as inheritance, but it’s something different.

You could use an abstract class instead that inherits from MarshalByRefObject and and requires your interfaces to be implemented.

Depending on how you need to enforce your requirement, generic constraints might help, too. For generic type parameters, you can set class constraints, like class Argh<T> where T : MarshalByRefObject, ISomeInterface.