public static void Main()
DateTime dtBirthday = new DateTime(2022,06,11);
DateTime dtTwentyOneYearsAgo = DateTime.Now.AddYears(-21);
if (dtBirthday<=dtTwentyOneYearsAgo){
Console.WriteLine(dtBirthday.ToLongDateString()+" is over the legal drinking age.");
Console.WriteLine(dtBirthday.ToLongDateString()+" is under the legal drinking age.");