using System;

using System.Collections.Generic;

​

namespace Interfaces

{

    public class Program

    {

        public static void Main(string[] args)

        {

            List<Dog> dogs = new List<Dog>();

            dogs.Add(new Dog("Fido"));

            dogs.Add(new Dog("Bob"));

            dogs.Add(new Dog("Adam"));

            dogs.Sort();

            foreach(Dog dog in dogs)

                Console.WriteLine(dog.Describe());

        }

    }

​

    interface IAnimal

    {

        string Describe();

​

        string Name

        {

            get;

            set;

        }

    }

​

    class Dog : IAnimal, IComparable

    {

        private string name;

​

        public Dog(string name)

        {

            this.Name = name;

        }

​

        public string Describe()

        {

            return "Hello, I'm a dog and my name is " + this.Name;

        }

​

        public int CompareTo(object obj)

        {

            if(obj is IAnimal)

                return this.Name.CompareTo((obj as IAnimal).Name);

            return 0;

        }

​

        public string Name

        {

            get { return name; }

            set { name = value; }

        }

    }

}