How to use an Interface of external dll in c#

Question

I need to use some methods that in an external dll, I have already done something like that, but this time that external dll is an Interface.

I do like this:

Assembly Assembly = Assembly.LoadFrom("fullpathofdll"); 
Type Type = Assembly.GetType("mytype"); 
dynamic Instance = Activator.CreateInstance(Type);

But I got this error: Cannot create an instance of an interface

I understand that's not possible instaciate an interface, but I don't know how to do this to work.

Someone can help?

Answer 1

An interface is supposed to be a "contract" for you to implement, not instantiate. Your own implementation of the interface can then be instantiated via reflection the way you're doing above.