Interfaces executing Polymorphic Traits

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;

namespace InterF2
{
    class Program
    {
        static void Main(string[] args)
        {

            shape[] s = { new Triange("Tri1"), new Hexagon("Hex1"), new Test("Test1"), new Hexagon("Hex2") };

            

            Console.WriteLine();

            for (int i = 0; i < s.Length; i++)
            {
                Console.WriteLine("class Draw function for the Array");

                s[i].Draw();

                if (s[i] is IDraw)
                {
                    IDraw dr = s[i] as IDraw;

                    Console.WriteLine("Interface Draw function for the Array");

                    Console.WriteLine();

                    dr.Draw();

                    Console.WriteLine("No of Points for interface implementation {0}", dr.GetPoints());

                }

                Console.WriteLine("........................................................");
            }
            
            Console.ReadLine();
                        
        }
    }
    public class Hexagon : shape, IDraw
    {

        public Hexagon(string s)
            : base(s)
        {
        }

        public override void Draw()
        {
            Console.WriteLine("Hexagon class and name is {0}", sname);
        }

        public byte GetPoints()
        {
            return 6;

        }


    }
    public class Triange : shape, IDraw
    {

        public Triange(string s)
            : base(s)
        {

        }

        public override void Draw()
        {
            Console.WriteLine("The Triangle class Name is {0}", sname);

        }

        public byte GetPoints()
        {

            return 3;
        }

    }

    public abstract class shape
    {
        public string sname;

        public shape(string s)
        {

            sname = s;
        }

        public abstract void Draw();
        
    }

    public interface IDraw
    {

        void Draw();

        byte GetPoints();

    }

    public class Test :shape ,IDraw
    {

        public Test(string s)
            : base(s)
        {
            

        }
        public override void Draw()
        {

            Console.WriteLine("The Name of the shape is {0}", sname);

        }

        void IDraw.Draw()
        {
           
             Console.WriteLine("IDraw interface  is Drawn"); 
             
        }

        public byte GetPoints()
        {
            return 0;
        }
    }
}