枚举类型

C#中枚举类型用Enum表示

class Example2_10
{

    enum Planets
    {
        Mercury = 1,
        Venus,
        Earth,
        Mars,
        Jupiter,
        Saturn,
        Uranus,
        Neptune,
        Pluto
    }

    public static void Main()
    {

        System.Console.WriteLine("Position of Earth = " +
          (int)Planets.Earth);

        System.Console.WriteLine("Planets.Earth = " +
          Planets.Earth);
        string i = System.Console.ReadLine();
    }

}