枚举

namespace ConsoleApplication2
{
    enum orientation : byte
    {
        north=1,
        south=2,
        east=3,
        west=4

    }

    class Program
    {
        static void Main(string[] args)
        {
            byte directionByte;
            string directionString;
            orientation myDirection = orientation.north;
            Console.WriteLine("myDirection={0}", myDirection);
            directionByte = (byte)myDirection;
            directionString = Convert.ToString(myDirection);
            Console.WriteLine("byte equivalent={0}", directionByte );
            Console.WriteLine("string equivalent={0}", directionString );
            Console.ReadKey();
        }
    }
}