c#:如何使用枚举来存储字符串常量？

public enum Colors
{
    Red = 0,
    Green = 1,
    Blue = 2
}

public static class EnumExtensions
{
    public static string GetString(this Colors color)
    {
        switch (color)
        {
            case Colors.Red:
                return "Red";
            case Colors.Green:
                return "Green";
            case Colors.Blue:
                return "Blue";
            default:
                throw new ArgumentOutOfRangeException(nameof(color), color, null);
        }
    }
}

class Program
{
    static void Main(string[] args)
    {
        Colors color = Colors.Red;
        string colorString = color.GetString();
        Console.WriteLine(colorString); // Output: Red
    }
}