tnb

using System;
using TestInput;
/*
Part of Lesson 7 of C# console programming intro series at URL:
http://williammillerservices.com/windows-c-console-programming/
GitHub gist: https://gist.github.com/kyrathasoft/a4087f5f55f33634fc13932f65eabecf
Pastebin.com: https://pastebin.com/4cNXLcvQ
*/
namespace CalcDaysTillNextBirthday
{
    class DaysTillNextBirthday
    {
        static void Main(string[] args)
        {
            //declare vars we'll need...
            string sData = String.Empty;
            DateTime dt;

            //loop till valid date entered
            while (!Tester.IsDateAndLiesInThePast(sData))
            {
                string msg = "Please enter your birthdate ";
                msg += "(mm/dd/yyyy): ";
                Console.Write(msg);
                sData = Console.ReadLine().Trim();
                if (Tester.IsDate(sData))
                {
                    DateTime dt2 = DateTime.Parse(sData);

                    if (dt2 > DateTime.Now)
                    {
                        Console.WriteLine("Uh, your birth date can't lie in the future...");
                    }
                }
            }

            /* The string entered by the user at the keyboard can be parsed
            to a DateTime that lies in the past... */

            dt = DateTime.Parse(sData);

            /* Calculate days till next birthday and print that data to the
            console for the user to view */

            int days = Tester.DaysTillNextBirthday(dt);
            Console.Write("Number of whole (i.e., full 24-hour) days till ");
            Console.WriteLine("your next birthday: {0}", days.ToString());
        }
    }
}