How to assign value to DateTime? field of object.

Question

I have declared Person class as below. public class Person { public string Prefix { get; set; } public string FirstName { get; set; } public string LastName { get; set; } public DateTime? DateOfBirth { get; set; } } I create an Person object. Person _person = new Person { Prefix = "Mr", FirstName = "William", LastName = "Jonathan", DateOfBirth = DateTime.Now.AddYears(-29) }; Problem --> I got an error "Object reference not set to an instance of an object." in setting value to DateOfBirth. Anybody help me? How to solved it? Thank you. Thakerng.

Sanwar Ranwa · Answer

Code is running properly using System; using System.Collections.Generic; using System.Linq; using System.Text; using System.Threading.Tasks; namespace ConsoleApp3 { public class Person { public string Prefix { get; set; } public string FirstName { get; set; } public string LastName { get; set; } public DateTime? DateOfBirth { get; set; } } class Program { static void Main(string[] args) { Person _person = new Person { Prefix = "Mr" , FirstName = "William" , LastName = "Jonathan" , DateOfBirth = DateTime.Now.AddYears(-29) }; Console.WriteLine(_person.Prefix+ _person.DateOfBirth+ _person.FirstName +_person.LastName); Console.Read(); } } } can you show the error messge ,where excatly the error

Thakerng Kruabkonto · Answer

Thank you for all. I have re checked my code someting mistake. Thank for guidance. Thakerng.

Rajanikant Hawaldar · Answer

your code working for me somewhere your triying to access properties from object and object is null means memory not assigned to object check it by debugging, use Exception Settings to identify exception

Anju · Answer

Could you please share more details for the issue as per initial review it appears to be fine.