Given the scenario...

interface IBase{ 
  void Process(int value);
}

abstract class Base : IBase
{
 public virtual void Process(int value){ throw new NotImplementedException(); }
}

class Implemented: Base, IBase
{
 public void Process(int value)
 {
   // .. some code here.. 
 }
}

I'm trying to write a loop similar to the following.

foreach( Base b in CollectionOfImplemented )
{
 b.Process( // something will go here // );
}

Trying this, it keeps calling Base.Process, instead of Implemented.Process; but the type in the collection is Implemented, not Base. Boxing it seems to work, but I was hoping to see if I could find a more intelligent approach to it, since the Collection will contain other types of objects that also inherit from Base.