原

现

源代码

using System.Drawing;

namespace 语法糖
{
    internal class Program
    {
        static void Main(string[] args)
        {
            

        }

        private Color GetColorRgb(ColorEnum colorEnum)
        {
            switch(colorEnum)
            {
                case ColorEnum.Red:
                    return Color.FromArgb(0, 0, 0);
                case ColorEnum.Blue:
                    return Color.FromArgb(0, 0, 0);
                case ColorEnum.Black:
                    return Color.FromArgb(0, 0, 0);
                default:
                    throw new ArgumentException(
                        message: "invalid enum value",
                        paramName: nameof(colorEnum)
                        );
            }
        }

        private Color GetColorRgb2(ColorEnum colorEnum)
        {
            return colorEnum switch
            {
                ColorEnum.Red => Color.FromArgb(0, 0, 0),
                ColorEnum.Blue => Color.FromArgb(0, 0, 0),
                ColorEnum.Black => Color.FromArgb(0, 0, 0),
                _ => throw new ArgumentException(
                        message: "invalid enum value",
                        paramName: nameof(colorEnum)
                        )
            };
        }

        public enum ColorEnum
        {
            Red,
            Black,
            Blue,
        }

    }
}