Collections with generic objects

Question

There is a method that takes a list of base objects as a parameter.

abstract class Base {}
class MyClass:Base {}
//...
void Method(List<Base> list) {}

When I`m calling that method, I want to pass list of derived objects.

var derivedList = new List<MyClass>();
Method(derivedList);

But I cannot do that because collection of derived is not the same as collection of base objects. What is the best practice to handle this situation? Now I'm using my extension .ToBase() where I create new collection, but I think there is nicer solution.

Thanks.

Answer 1

Make your Method generic:

public void Method<T>(List<T> list) where T : Base
{
    //Do your stuff
}