using System;

​

Derived d = new();

d.Update("Good string");

string sOut1 = d.MyString;

string sOut2 = d.GetTheString();

Console.WriteLine(sOut1);

Console.WriteLine(sOut2);

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;

    }

}