using System.Collections.Generic;

​

class Stuff {

    string owner;

    public void ReplaceOwner(string newOwner) { owner = newOwner; }

};

public class Program

{

    static List<Stuff> CoseDiRoberto = new List<Stuff>();

    public static void Main()

    {

        CoseDiRoberto.ForEach(cosa => cosa.ReplaceOwner(("Mulas Team")));

    }

}