public void CheckBirthdate(string year)
{
string birthdateYear = Birthdate.Substring(Birthdate.Length - 4);
if (birthdateYear == year)
{
Console.WriteLine(Birthdate);
}
}
public bool CheckBirthdate(string year)
{
string yearOfBirth = Birthdate.Substring(Birthdate.Length - 4, 4);
return(yearOfBirth == year);
}