namespace Syntax
{
    public class GenericClass<T>
    {
        private class Node
        {
            private T data;
            private Node next;

            public Node(T t)
            {
                next = null;
                data = t;
            }

            public Node Next { get { return next; } set { next = value; } }
            public T Data { get { return data; } set { data = value; } }
        }


        private Node head;
        public GenericClass()
        {
            head = null;
        }

        public void AddHead(T t)
        {
            Node n = new Node(t);
            n.Next = head;
            head = n;
        }

        public IEnumerator<T> GetEnumerator()
        {
            Node current = head;
            while (current != null)
            {
                yield return current.Data;
                current = current.Next;
            }
        }


        public static void Showcase()
        {
            GenericClass<int> list = new GenericClass<int>();

            for(int x = 0; x <10; x++)
            {
                list.AddHead(x);
            }

            System.Console.WriteLine("nPrinting generic class using ints.");
            foreach (int i in list)
            {
                System.Console.Write(i + ", ");
            }

            GenericClass<char> listChars = new GenericClass<char>();
            string abc = "abcdefghijklmnopqrstuvw";
            foreach (char c in abc)
            {
                listChars.AddHead(c);
            }

            System.Console.WriteLine("nnPrinting generic class using chars.");
            foreach (var c in listChars)
            {
                System.Console.Write(c + ", ");
            }
        }
    }
}

GenericClass<int>.Showcase();

GenericClass<string>.Showcase();
GenericClass<char>.Showcase();