enum和struct的用法-----c#

 public struct Color1
    {
        public const int Blue = 1;
        public const int Green = 2;
        public static int Yellow = 3;
    }

    public enum Color2:int
    {
       Blue=1,
       Green=2
    }

MessageBox.Show(Color1.Blue.ToString("D"));//转换成数字显示
            MessageBox.Show(Color2.Blue.ToString("D"));//转换成数字显示