using System;

public class Program

{

    public static void Main()

    {

        var test1 = new IdName();

        test1.Id = 9;

        DoSomething(ref test1);

        Console.WriteLine(test1.Id + " " + test1.Name);

        var test2 = new IdName();

        test2.Id = 9;

        DoSomething2(test2);

        Console.WriteLine(test2.Id + " " + test2.Name);

    }

    public class IdName {

        public int Id { get; set; } 

        public string Name { get; set; }

    }

    public static void DoSomething(ref IdName idName) {

        idName.Id = 1;

        idName.Name = "Changed";

    }

    public static void DoSomething2(IdName idName) {

        idName.Id = 2;

        idName.Name = "Also changed";

    }   

}