public bool IsOlderThan(IStudent other)
{
try
{
DateTime firstStudentBirthday = this.GetBirthday(this.AdditionalInfo);
DateTime secondStudentBirthday = other.GetBirthday(other.AdditionalInfo);
return firstStudentBirthday < secondStudentBirthday;
}
catch (Exception e)
{
Console.WriteLine(e.Message);
throw new ArgumentException("One or both students do not have valid date of birth information provided.");
}
}