C# -『Compute Age』

/*** * Controller ***/ public ActionResult Age() { var Bday = DateTime.ParseExact ( "20160113","yyyyMMdd", System.Globalization.CultureInfo.InvariantCulture); var Cday = DateTime.ParseExact ( "20160613", "yyyyMMdd", System.Globalization.CultureInfo.InvariantCulture ); Age myAge = new Age ( Bday, Cday ); ViewBag.myYears = myAge.Years.ToString(); ViewBag.myMonths = myAge.Months.ToString(); ViewBag.myDays = myAge.Days.ToString ( ); return View (); } public class Age { public int Years; public int Months; public int Days; public Age( DateTime Bday ) { this.Count ( Bday ); } public Age( DateTime Bday, DateTime Cday ) { this.Count ( Bday, Cday ); } public Age Count( DateTime Bday ) { return this.Count ( Bday, DateTime.Today ); } public Age Count( DateTime Bday, DateTime Cday ) { if ( ( Cday.Year - Bday.Year ) > 0 || ( ( ( Cday.Year - Bday.Year ) == 0 ) && ( ( Bday.Month < Cday.Month ) || ( ( Bday.Month == Cday.Month ) && ( Bday.Day <= Cday.Day ) ) ) ) ) { int DaysInBdayMonth = DateTime.DaysInMonth ( Bday.Year, Bday.Month ); int DaysRemain = Cday.Day + ( DaysInBdayMonth - Bday.Day ); if ( Cday.Month > Bday.Month ) { this.Years = Cday.Year - Bday.Year; this.Months = Cday.Month - ( Bday.Month + 1 ) + Math.Abs ( DaysRemain / DaysInBdayMonth ); this.Days = ( DaysRemain % DaysInBdayMonth + DaysInBdayMonth ) % DaysInBdayMonth; } else if ( Cday.Month == Bday.Month ) { if ( Cday.Day >= Bday.Day ) { this.Years = Cday.Year - Bday.Year; this.Months = 0; this.Days = Cday.Day - Bday.Day; } else { this.Years = ( Cday.Year - 1 ) - Bday.Year; this.Months = 11; this.Days = DateTime.DaysInMonth ( Bday.Year, Bday.Month ) - ( Bday.Day - Cday.Day ); } } else { this.Years = ( Cday.Year - 1 ) - Bday.Year; this.Months = Cday.Month + ( 11 - Bday.Month ) + Math.Abs ( DaysRemain / DaysInBdayMonth ); this.Days = ( DaysRemain % DaysInBdayMonth + DaysInBdayMonth ) % DaysInBdayMonth; } } else { throw new ArgumentException ( "Birthday date must be earlier than current date" ); } return this; } } /** * View - Age * resule: 0 5 0 **/ @ViewBag.myYears @ViewBag.myMonths @ViewBag.myDays