using System;

public class Program

{

    public static void Main()

    {

        var item = new Item();

        Console.WriteLine(item.ToString());

    }

}

​

public class Design

{

    public int ID { get; set; }

    public string Name { get; set; }

}

​

public class Technique

{

    //TODO

}

​

public class Item

{

    //TODO

}

​

//TODO add Material class and any data structures it needs