public static void Main()
DateTime dtBirthday = new DateTime(1999, 07, 24);
if(DateTime.Now.AddYears(-21) > dtBirthday)
Console.WriteLine(DateTime.Now.AddYears(-21).ToString("MMMM dd, yyyy") + " is under the legal drinking age and " + dtBirthday.ToString("MMMM dd, yyyy") + " is over the legal age.");
Console.WriteLine(DateTime.Now.AddYears(-21).ToString("MMMM dd, yyyy") + " is under the legal drinking age and " + dtBirthday.ToString("MMMM dd, yyyy") + " is under the legal age.");