Using generics in abstract classes

Question

I\'m working on an abstract class where the implementing class needs to implement a list of T. The problem is that this doesn\'t work:

public class AbstractC         


        

Answer 1

You need to specify the type in the abstract class:

public class AbstractClass<T>
{
    public int Id { get; set; }
    public int Name { get; set; }

    public abstract List<T> Items { get; set; }
}

public class Container : AbstractClass<Widgets>
{
    public List<Widgets> Items { get; set; }
}