Method extension of an enumerated type in C#

enum_extension.cs

    public static class Extensions
    {
        public static string ToString(this BodyParameter p)
        {
            switch (p)
            {
                case BodyParameter.HEIGHT:
                    return "Height";
                case BodyParameter.WEIGHT:
                    return "Weight";
                default:
                    return "";
            }
        }
    };
    public enum BodyParameter
    {
        HEIGHT = 0,
        WEIGHT = 1
    }