[C#] Enum Extensions

public static class EnumExtensions     {         /// <summary>         /// 將Enum轉為數字         /// </summary>         /// <param name="self"></param>         /// <returns></returns>         public static int ToIntValue(this Enum self)         {             return Convert.ToInt16(self);         }         /// <summary>         /// 取得Enum的描述標籤內容         /// </summary>         /// <returns></returns>         public static string GetDescription(this Enum self)         {             FieldInfo fi = self.GetType().GetField(self.ToString());             DescriptionAttribute[] attributes = null;             if (fi != null)             {                 attributes =                     (DescriptionAttribute[])fi.GetCustomAttributes(typeof(DescriptionAttribute), false);                 if (attributes != null && attributes.Length > 0)                     return attributes[0].Description;             }             return self.ToString();         }     }