using System;

​

public class StringTransformer {

    public string Author {

        get;

        set;

    }

    public StringTransformer(string author) {

        this.Author = author;

    }

    public virtual string Transform(string s) {

        return s;

    }

}

​

    public class BraidynTransform: StringTransformer{

        public BraidynTransform() : base("braidyn"){

        }

            public override string Transform(string s){

                char[] array = s.ToCharArray();

                Random randomString = new Random();

                int n = array.Length;

                while (n > 1){

                    n--;

                    int k = randomString.Next(n + 1);

                    var value = array[k];

                    array[k] = array[n];

                    array[n] = value;

                }

                return new string(array);

        }

    }

​

public class Program

{

    public static void Main()

    {

        StringTransformer basic = new StringTransformer("shepherd");

        Console.WriteLine("{0} would change {1} to {2}", basic.Author, "cheese", basic.Transform("cheese"));

        BraidynTransform bbtrans = new BraidynTransform();

        string result = bbtrans.Transform("superhero");

        Console.WriteLine(result);

    }

}