public static int GetAge(DateTime bday)
DateTime today = DateTime.Today;
int age = today.Year - bday.Year;
if (bday > today.AddYears(-age))
public static void Main()
DateTime bday1 = new DateTime(1982, 6, 1);
DateTime bday2 = new DateTime(1982, 1, 1);
Console.WriteLine(GetAge(bday1));
Console.WriteLine(GetAge(bday2));