using System;

​

namespace Example

{

    public class Tile

    {

        public TileMap<Tile> tileMap { get; set; }

    }

​

    public class SpecificTypeOfTile : Tile

    {

    }

    public class TileMap<T> where T : Tile

    {

        public override string ToString()

        {

            return "Hello world!!!";

        }

    }

    public class TileOnlyMap : TileMap<Tile>

    {

        public TileOnlyMap()

        {

            var newTile = new Tile();

            newTile.tileMap = this;

​

            var newTile2 = new SpecificTypeOfTile();

            newTile2.tileMap = this;

        }

    }

    public class Program

    {

        public static void Main()

        {

            var t = new TileOnlyMap();

            Console.WriteLine(t);

        }

    }

}