public static void AddUser(String name, DateTime date, uint age)
        {
            User user = new User {
                Id = Guid.NewGuid(), Name = name, BirthDay = date, Age = age
            };

            TextFiles.AddUser(user);
        }
        public bool AddUser(String name, String date, String strAge)
        {
            DateTime birthDay = DateTime.ParseExact(date, "dd.MM.yyyy", null);
            int      age      = Convert.ToInt32(strAge);
            User     user     = new User {
                Name = name, BirthDay = birthDay, Age = age
            };

            storage.AddUser(user);
            return(true);
        }