static void Main(string[] args)
        {
            var produce = new List<object>();

            var f1 = new Fruit("Apple",8.5,3);
           // f1.Name = "Apple";
           // f1.Weight = 4.6;
           // f1.Quantity = 3;
            produce.Add(f1);

            var f2 = new Vegetable();
            f2.Name = "Bananna";
            f2.Weight = 4.9;
            f2.Quantity = 7;
            produce.Add(f2);

            produce.Add(new Vegetable());
            ((Vegetable)produce[2]).Name = "Carrot";
            ((Vegetable)produce[2]).Weight = 9.6;
            ((Vegetable)produce[2]).Quantity = 14;

            Console.WriteLine("There are "+produce.Count+" items");

            foreach (var item in produce)
            {
                Console.WriteLine(item);
            }

        }

 /// <summary>
 /// Puts the vegetable in the <see cref="Kitchen.Utensil"/>.
 /// </summary>
 /// <param name="vegetable">The vegetable.</param>
 /// <returns>The result of the action.</returns>
 public string Add(Vegetable vegetable)
 {
     return string.Format(
         "Put the {0} in the {1}.\r\n" +
         "(\"Double, double toil and trouble;\r\nFire burn, and cauldron bubble.\")",
         vegetable,
         this);
 }

        private void Cut(Vegetable vegetable)
        {
            if (vegetable == null)
            {
                throw new ArgumentNullException("Vegetable cannot be null");
            }

            vegetable.IsCut = true;
        }

 public void Add(Vegetable vegetable)
 {
     if (vegetable.IsPeeled && vegetable.IsCut)
     {
         this.Content.Add(vegetable);
     }
     else
     {
         throw new ArgumentException("The vegetable shoud be peeled and cut.");
     }
 }

    public void Cook(Vegetable vegetable)
    {
        vegetable = this.GetVegetable();

        this.Peel(vegetable);

        this.Cut(vegetable);

        Bowl bowl = this.GetBowl();
        bowl.BowlList.Add(vegetable);
    }

    // Methods
    public void Cook(Vegetable item)
    {
        this.Peel(item);
        this.Cut(item);

        // Creating bowl
        Bowl bowl = this.GetBowl();

        // Adding the peeled and cut vegies
        // to the bowl
        bowl.AddVegetables(item);
    }

 public void AddVegetable(Vegetable veg,Vector2 vegPosition)
 {
     if (vegPosition.x < 0 || vegPosition.x > 2 || vegPosition.y < 0 || vegPosition.y > 2) {
         Debug.LogError ("<color=green>WRONG VEGETABLE POSITION</color>");
         return;
     }
     else {
         VegetableBoard[(int)vegPosition.x,(int)vegPosition.y] = (Vegetable)Instantiate(veg);
         VegetableBoard[(int)vegPosition.x,(int)vegPosition.y].transform.SetParent(this.gameObject.transform);
         VegetableBoard[(int)vegPosition.x,(int)vegPosition.y].transform.localPosition = new Vector3(vegPosition.x * 3, 0, vegPosition.y * 3);
     }
 }

        public void Cook(Vegetable vegetable)
        {
            Potato potato = new Potato();
            potato.Peel();
            potato.Cut();

            Carrot carrot = new Carrot();
            carrot.Peel();
            carrot.Cut();

            Bowl bowl = new Bowl();
            bowl.Add(potato);
            bowl.Add(carrot);
        }

        public void Cook(Vegetable vegetable)
        {
            Potato potato = this.GetPotato();
            Carrot carrot = this.GetCarrot();

            this.Peel(potato);
            this.Peel(carrot);

            this.Cut(potato);
            this.Cut(carrot);

            Bowl bowl = this.GetBowl();
            bowl.Add(carrot);
            bowl.Add(potato);
        }

 private void Cut(Vegetable potato)
 {
     // ...
 }

 private void Peel(Vegetable vegetable)
 {
     // TODO: Implement this method
     throw new NotImplementedException();
 }

 internal void Add(Vegetable carrot)
 {
     throw new NotImplementedException();
 }

 private void Peel(Vegetable vegetable)
 {
     // some vegetable peeling logic
     vegetable.IsPeeled = true;
 }

 private void Cut(Vegetable vegetable)
 {
     // some vegetable cutting logic
     vegetable.IsCut = true;
 }

 public void Cut(Vegetable potato)
 {
     //...
 }

 internal void Add(Vegetable vegetable)
 {
 }

 private void Peel(Vegetable vegetable)
 {
     vegetable.Peel();
 }

 public void Add(Vegetable vegetable)
 {
     //...
 }

 private void Peel(Vegetable vegetable)
 {
     Console.WriteLine("Peeling {0}", vegetable);
 }

 private void Cut(Vegetable vegetable)
 {
     Console.WriteLine("Cutting {0}...", vegetable);
 }