[m.timoney]

I have Classes defines as

class A<T> where T:B
class B
class C:B
class D:B

now i have a List<A<B>>

and i want to add a object of A<C> and A<D> to it.

now as both C and D inherit from B i assumed that would work but "Cannot implicitly convert type 'A<C>' to 'A<B>'"

So i tried

Code:

        private List<A<B>> AllB
        {
            get
            {
                List<A<B>> rtn = new List<A<B>>();

                foreach( A<C> c in colOfC){
                    A<C> tmp = c;
                    A<B> tmp2 = (A<B>)tmp;
                    rtn.Add(tmp2);
                }
                foreach(A<D> d in colOfD){
                    A<D> tmp = d;
                    A<B> tmp2 = (A<B>)tmp;
                    rtn.Add(tmp2);
                }
                return rtn;
            }
        }

and it wont have it "Cannot convert type 'A<C>' to 'A<B>'"


any suggestion on how to get this working?

[m.timoney]

Ok i have a solution of sorts now

I've added a method to A that Clones the A object but also casts the C & D to a B during the cloning process