/*
Inheritence in c# with a pure virtual function. Known in
C# as an abstract method.
*/

public abstract class Name
    {
        protected string m_sName;

        public abstract void Say();

        public Name()
        {
            m_sName = "Base";
            Console.WriteLine("{0} is born.", m_sName);
        }
        ~Name()
        {
            Console.WriteLine("{0} is dead.", m_sName);
        }
    }

    class Fred : Name
    {

        public override void Say()
        {
            Console.WriteLine("My namespace is: {0}",m_sName);
        }

        public Fred() 
        {
            m_sName = "Fred";
            Console.WriteLine("{0} is born.",m_sName); 
        }
        ~Fred() 
        { 
            Console.WriteLine("{0} is dead.",m_sName); 
        }
    }
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }

        private void button1_Click(object sender, EventArgs e)
        {
            Name n = new Fred();

            n.Say();

        }
    }