I have been tasked with helping our HR department create some new interview questions for candidates applying for development positions. As part of the process, I would like to assess their ability to both understand code without the help of a compiler and spot potential future problems. As such, I have devised a basic console application. The source code I will provide to the candidates and ask them the following questions:Would this code compile without any errors? If not, why not?Can you spot any potential issues in the code which might cause bugs in future?What improvements would you make to the code?I've got my own answers to the questions, but I would love to get some feedback to see if there's anything that I may have missed.using System;using System.Collections.Generic;namespace DeveloperTest{    class Program    {        static void Main(string[] args)        {            var users = new List<User>();            users.Add(new User(John Smith, 42, DateTime.Today));            string name = Jane Smith;            int age = 37;            int yearJoined = 17;            int monthJoined = 01;            int dayJoined = 15;            users.Add(new User()            {                Name = name,                Age = age,                DateJoined = new DateTime(day: dayJoined, month: monthJoined, year: yearJoined)            });            users[0].PrintUserInfo();            RemoveUsersUnderAge(users, 40);            Console.ReadKey();        }        private void RemoveUsersUnderAge(List<User> users, int age)        {            foreach (var user in users)            {                if (user.Age < age)                {                    users.Remove(user);                }            }        }    }    class User    {        private string _name;        private int _age;        private DateTime _dateJoined;        public User()        {        }        public User(string name, string age, DateTime dateJoined)        {            if (name == null) Name = Unknown;            if (age == null) Age = 0;            if (dateJoined == null) DateJoined = DateTime.Today;            Name = name;            Age = Convert.ToInt32(age);        }        public string Name        {            get { return _name; }            set { _name = value; }        }        public int Age        {            get { return _age; }            set { _age = value; }        }        public DateTime DateJoined        {            get { return _dateJoined; }            set { _dateJoined = value; }        }        private void PrintUserInfo()        {            Console.WriteLine($Name: {this.Name}.);            Console.WriteLine($Age: {this.Age} years old.);            Console.WriteLine($Joined: {this.DateJoined}.);        }    }}
Console application for developer interviews
c#;.net;code reviews;debugging;maintainability