How to Inherit method but with different return type?

Question

Given the following classes:

ClassA
{
     public ClassA DoSomethingAndReturnNewObject()
     {}    
}

ClassB : ClassA
{}

ClassC : ClassA
{}

Answer 1

Well, the correct answer is no and, generally, this is a bad idea. If you are returning something completely different, find another way.

However, if you aren't returning something completely different, an interface can solve your issue. Instead of returning a class, return an interface and have classes A, B, and C return objects that implement that interface in the way they see fit.