ArgsTests.NullableGuidReviver.Revive C# (CSharp) Метод

        public static Nullable<Guid> Revive(string key, string value)
        {
            Guid ret;
            if(Guid.TryParse(value,out ret) == false)
            {
                throw new ValidationArgException("Bad GUID: CUSTOM MESSAGE");
            }
            return ret;
        }