using System;

public class Program

{

    public void Main()

    {

        stringObject A = new stringObject("A");

        stringObject B = new stringObject("B");

        object[] O = { A, B };

        //Before changing, both the object as the array on index 0 still show the original string "A"

        Console.WriteLine("   A:  " + A.Content);

        Console.WriteLine("O[0]:  " +(O[0] as stringObject).Content);

        changeStringArrayByReference(O, 0, "C");

        //After updating, we now see that both the array on index 0, as well as the original A object have now changed to string "C"

        Console.WriteLine("   A:  " + A.Content);

        Console.WriteLine("O[0]:  " +(O[0] as stringObject).Content);

    }

    private void changeStringArrayByReference(object[] myArray, int index, string newvalue) {

        stringObject x = myArray[index] as stringObject;

        x.Content = newvalue;

    }

}

​

​

public class stringObject

{

    private string content;

    public string Content { get { return content; } set { content = value; } }

    public stringObject(string value) {

        Content = value;

    }

}