public class Mammal
    {
        protected string _Name;

        public virtual string Name()
        {
                return (this._Name + " - of type " + this.GetType());
        }
        virtual public Mammal(string Name)
        {
            this._Name = Name;
        }
    }
    public class Dog : Mammal
    {
        public override Mammal(string Name)
        {
            base._Name = Name;
        }

        public override string Name()
        {
            return (base._Name + "Dog");
        }
    }
    class Program
    {
        static void Main(string[] args)
        {
            Mammal AnimalA = new Mammal("SubjectA");
            Console.WriteLine("{0}", AnimalA.Name);

            Mammal AnimalB = new Dog("SubjectB");
            Console.WriteLine("{0}", AnimalB.Name);
            Console.ReadLine();

        }
    }