Calendar which defines how the dates are handled, calculated, formatted, etc. Setter operations are only enabled on non-read-only objects. Objects of this class should only be allocated using System::MakeObject() function. Never create instance of this type on stack or using operator new, as it will result in runtime errors and/or assertion faults. Always wrap this class into System::SmartPtr Pointer and use this Pointer to pass it to functions as argument....int) const Adds days to time point. virtual DateTime AddHours (...int) const Adds hours to time point. virtual DateTime AddMilliseconds...