Synology.Utilities.QueryStringParameter.GetEnumDescription C# (CSharp) Method

        private static string GetEnumDescription(Enum value)
        {
            if (value == null) return null;

            var type = value.GetType().GetTypeInfo();
            var res = value.ToString();

            if (type.CustomAttributes.Any(t => t.AttributeType == typeof(FlagsAttribute)))
            {
                var members = type.AsType().GetMembers();
                var conversion = members.SelectMany(t => t.GetCustomAttributes(typeof(DescriptionAttribute), false).Select(a => new KeyValuePair<string, string>(t.Name, ((DescriptionAttribute)a).Description))).ToDictionary(t => t.Key, t => t.Value);

                res = string.Join(",", res.Split(',').Select(t => t.Trim()).Select(t => conversion.ContainsKey(t) ? conversion[t] : t));
            }
            else
            {
                var memInfo = type.AsType().GetMember(value.ToString());

                if (memInfo.Length > 0)
                {
                    var attrs = memInfo[0].GetCustomAttributes(typeof(DescriptionAttribute), false).ToList();

                    if (attrs.Any())
                        res = ((DescriptionAttribute)attrs.First()).Description;
                }
            }

            return res;
        }