Adding generic object to generic list in C#

Question

I have class where the relevant part looks like

class C {
    void Method(SomeClass obj) {
        list.Add(obj);
    }
    List l         


        

Answer 1

Unfortunately, there is no direct equivalent in C# 3.0 as generics are invariant. You'll be able to do something like this in a graceful manner using C# 4.0 safe co/contra-variance feature. To workaround it, you could inherit SomeClass from a nongeneric base and create a List instead. If each instance of the class should hold only one type, you could make the class itself generic and set the type parameter there.