Count How Many Days Old You are ?

DateTime d1 = new DateTime();
DateTime d2 = new DateTime();
Console.WriteLine("Enter today's date in year/month/date");
d2 = Convert.ToDateTime(Console.ReadLine()).Date;
Console.WriteLine("enter your birthdate");
d1 = Convert.ToDateTime(Console.ReadLine()).Date;
if (d2 > d1)
{
    TimeSpan difference = d2 - d1;
    // using (StreamWriter sw = new StreamWriter("E:\\Shridhar\\Birthday.txt")) ;
    Console.WriteLine("You are " + difference.Days + " days old. ");
}
else
{
    Console.WriteLine("today's date should be greater than your birthdate .");
}
Console.ReadKey();