public abstract class testFindRefBaseClassCS<T>
    {
        public testFindRefBaseClassCS() { }
        protected abstract string displayName();
        protected abstract testFindRefBaseClassCS<T> cloneMe();
    }

    class testFindRefChildOneCS<T> : testFindRefBaseClassCS<T>
    {
        public testFindRefChildOneCS() { }
        protected override string displayName() { return "child class"; }
        protected override testFindRefBaseClassCS<T> cloneMe() { return new testFindRefChildOneCS<T>(); }
    }

    class testFindRefGrandChildOneCS<T> : testFindRefChildOneCS<T>
    {
        public testFindRefGrandChildOneCS() { }
        protected override string displayName() { return "grandchild class"; }
        protected override testFindRefBaseClassCS<T> cloneMe() { return new testFindRefGrandChildOneCS<T>(); }
    }

    abstract class testFindRefBaseClassCS
    {
        public testFindRefBaseClassCS() { }
	    abstract public string displayName();
        abstract public testFindRefBaseClassCS cloneMe();
    }

    class testFindRefChildOneCS : testFindRefBaseClassCS
    {
    	public testFindRefChildOneCS() { }
    	public override string displayName() { return "child class"; }
	    public override testFindRefBaseClassCS cloneMe() { return new testFindRefChildOneCS(); }
    }

    class testFindRefGrandChildOneCS : testFindRefChildOneCS
    {
        public testFindRefGrandChildOneCS() { }
        public override string displayName() { return "grandchild class"; }
        public override testFindRefBaseClassCS cloneMe() { return new testFindRefGrandChildOneCS(); }
    }