using System;

public class Program

{

    public static void Main()

    {

        Cow cow1 = new Cow("Paul");

        Console.WriteLine(cow1.MakeNoise());

        Console.WriteLine(cow1.ToString());

    }

}

​

public abstract class Animal

{

    private int LegCount {get;set;}

    private string Name {get;set;}

    public Animal(int legCount, string name)

    {

        LegCount = legCount;

        Name = name;

    }

    public abstract string MakeNoise();

    public virtual string Eat()

    {

        return "I eat feelings";

    }

    public override string ToString()

    {

        return string.Format("Animal name: {0} has {1} legs",this.Name, this.LegCount);

    }

}

​

public class Cow : Animal, ITryable<Cow>

{

    public Cow(string name) : base(4, name) {}

    public override string MakeNoise()

    {

        return "Moooooo";

    }

    public override string Eat()

    {

        return "I chew grass";

    }

    public bool CanBeTried(Cow cow)

    {

        return true;

    }

}

​

interface ITryable<T>{

    bool CanBeTried(T obj);

}