IList to IList

Question

I have a few classes:

class Vehicle
{
}

class Car : Vehicle
{
}

I have a list of the derived class: IList cars;

Answer 1

You can also take a look on Krzysztof's Cwalina article, Simulated Covariance for .NET Generics

Answer 2

Here are a couple of approaches using Linq:

IList<Derived> list = new List<Derived>();
list.Add(new Derived());

IList<Base> otherlist = new List<Base>(from item in list select item as Base);
IList<Base> otherlist2 = new List<Base>(list.Select(item => item as Base));