Days Alive

using System;

namespace DaysAlive
{
    class Program
    {
        static void Main(string[] args)
        {
            DateTime now = DateTime.Now;

            Console.Write("Enter your birthday: ");
            string input = Console.ReadLine();

            if(DateTime.TryParse(input, out DateTime inputDateTime))
            {
                TimeSpan daysPassed = now.Subtract(inputDateTime);
                Console.WriteLine($"Days passed since {inputDateTime.ToShortDateString()}: {daysPassed.Days:n0}");
            }
            else
            {
                Console.WriteLine("Please enter a correct date");
            }
            Console.ReadLine();
        }
    }
}