public static void Main(string[] args) { Person p1 = new Person() { Name = "a", Age = new DateTime(2000, 10, 10), Email = "[email protected]", PhoneNumber = "+79859057437" }; Person p2 = new Person("a", new DateTime(2000, 10, 10)); Person p3 = new Person("a", new DateTime(2000, 10, 10), "sfsd", "[email protected]"); Person p4 = new Person("a", new DateTime(2000, 10, 10)) { Email = "*****@*****.**", PhoneNumber = "sadfs" }; Console.WriteLine(p4.GetFullInfo()); DateTime d = new DateTime(2000, 4, 5); var d2 = DateTime.Now; Console.WriteLine($"Current time: {d2.Hour:D2}:{d2.Minute:D2}:{d2.Second:D2}"); var difference = (d2 - d).Days; Console.WriteLine(difference); Console.ReadLine(); }