.NET 4.x Интерфейс IComparable, метод CompareTo - C#

public class Car:IComparable
    {
       public int CarID { get; set; }
       public int CurrentSpeed { get; set; }
       public string PetName { get; set; }
       public Car(string name,int currSp,int id)
       {
           CurrentSpeed = currSp;
           PetName = name;
           CarID = id;
       }
       public Car() { }
 
       int IComparable.CompareTo(object obj)
       {
           Car temp = obj as Car;
           if (temp != null)
               return this.CarID.CompareTo(temp.CarID);
           else
               throw new ArgumentException("Param isn't a Car");
       }
    }
 
static void Main(string[] args)
        {
            Car[] my =new Car[5];
            my[0] = new Car("A", 10, 1);
            my[1] = new Car("B", 20, 5);
            my[2] = new Car("C", 30, 4);
            my[3] = new Car("D", 40, 3);
            my[4] = new Car("E", 50, 2);
            foreach(Car c in my)
            {
                Console.WriteLine("{0} {1}",c.CarID,c.PetName);
            }
            Array.Sort(my);
            Console.WriteLine();
            Console.WriteLine("here is the ordered set of cars:");
            foreach(Car c in my)
            {
                Console.WriteLine("{0} {1}", c.CarID, c.PetName);
            }
        }