Question

I have a class A and a class B, class B is inherit from class A.
Assume that I have:

A a1 = new B();
A a2 = new B();
List<A> LA = new List<A>{a1, a2};

Please help me how to convert List to List. I try to use List<B> LB = (List<B>)LA but get compiling error "Can't convert List<A> to List<B>".

Please help me. Thanks.

Note: only .NET 2.0. Thanks.

Answer 1

You have to cast each item in the list, not the whole list.

List<A> listA = new List<A>();
List<B> listB = new List<B>();
for (int i = 0; i < listA.Count; i++)
{
    listB.Add((B)listA[i]);
}