using System;

public class Program

{

    public static void Main()

    {

        var obj = new Composers();  // (A)

​

        var composer = obj.SecondComp();  // (B)

        composer = "Salieri";             // (C)

        obj.Display("** Without ref (Method SecondComp)- No change made"); //(D)

​

        composer = obj.SecondCompByRef(); // (E)

        composer = "Scarlatti";           // (F)

        obj.Display("** Only return ref (Method SecondCompByRef)- No change made");  // (G)

​

        ref var composerRef = ref obj.SecondCompByRef();   // (H)

        composerRef = "Satie";                             // (I)

        obj.Display("** Variable ref & return ref (Method SecondCompByRef) - Change made"); // (L)

    }

}

​

public class Composers

{

    private readonly string[] _comp =

                   new[] { "Mozart", "Ravel", "Rachmaninov" };  // (M)

​

    public string SecondComp()             // (N)

    {

        return _comp[1];

    }

​

    public ref string SecondCompByRef()    // (O)

    {

        return ref _comp[1];

    }

​

    public void Display(string desc)

    {     // (P)

        Console.WriteLine("\n" + desc);

        foreach (string x in _comp) Console.Write(x + " ");

    }

}