using System;

​

public class Base

  {

      public string MyString {get; set;} = "UNUPDATED";

      public bool Update(string sNewString)

      {

          if (!sNewString.Equals(""))

          { 

              MyString = sNewString;

              return true;

          }

          return false;

      }

  }

  public class Derived : Base

  {

      public string GetTheString()

      {

          return MyString;

      }

      //public bool 

  }

​

​

public class Program

{

    public static void Main()

    {

        //Run the code

        Derived d = new();

        d.Update("Good string");

        string sOut1 = d.MyString;

        string sOut2 = d.GetTheString();    

        System.Console.WriteLine("sOut1: {0} sOut2: {1}", sOut1, sOut2);

    }

}