Inheritance Fallback, C#

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//Rextester.Program.Main is the entry point for your code. Don't change it.
//Compiler version 4.0.30319.17929 for Microsoft (R) .NET Framework 4.5

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text.RegularExpressions;

namespace Rextester
{
    public class Program
    {
        public static void Main(string[] args)
        {
            //Your code goes here
            Console.WriteLine(new Goku().Say());
            Console.WriteLine(new Gohan().Say());
        }
    }
    
    public abstract class Base
    {
        public abstract string Say();
        public abstract string GetName();
    }
    
    public class Goku: Base
    {
        public override string Say()
        {
            return String.Format("My name is {0}", GetName());
        }
        public override string GetName()
        {
            return "Goku";
        }
    }

public class Gohan: Goku
    {
        public override string GetName()
        {
            return "Gohan";
        }
    }
}

Show compiler warnings [ + ] Show input
Compilation time: 0,14 sec, absolute running time: 0,09 sec, cpu time: 0,11 sec, average memory usage: 12 Mb, average nr of threads: 3