using System;
using System.Collections.Generic;
using System.Linq;
using System.Reflection;
using System.Text;
using System.Threading.Tasks;

namespace GetSon
{
    class Program
    {
        static void Main(string[] args)
        {
            User nullUser = new User();

            User notNullUser = new User();
            notNullUser.Name = "joey";

            Console.WriteLine(IsPropNull(nullUser));
            Console.WriteLine(IsPropNull(notNullUser));
            Console.ReadKey();
        }

        public static Boolean IsPropNull(Object obj)
        {
            Type t = obj.GetType();
            PropertyInfo[] props = t.GetProperties();
            foreach (var item in props)
            {
                if (item.GetValue(obj) == null)
                {
                    return true;
                }
            }
            return false;
        }
    }

    class User
    {
        public String Name { get; set; }
        public int Age { get; set; }
    }
}