Question

I have this base class:

public abstract class Parent {
    public void DoSomething() {
        var c=new GenericClass<**ThisInstanceType**>();
        c.DoYourThing();
    }
}

What should I put instead ThisInstanceType in order to use generics with the type of “this” (the current child instance)?

I cannot change the declaration of Parent.DoSomething(). It cannot be void DoSomething<T>().

Answer 1

You could do:

public abstract class Parent<T> : IParent
{
    public void DoSomething() {
        var c=new GenericClass<T>();
        c.DoYourThing();
    }
}

public sealed class Child : Parent<Child>
{
}

and if necessary you could add:

public interface IParent
{
void DoSomething();
}

BTW: If you include the full complete real life example, I might be able to give you a better solution

The other solution would be to use reflection to get the proper type and call the method at runtime…