แปลง ICS เป็น OST ผ่าน C #

// load the ICS file to be converted
// save ICS as a MSG
using var msgStream = new MemoryStream();
Aspose.Email.Calendar.Appointment
    .Load("My File.ics")
    .Save(msgStream, AppointmentSaveFormat.Msg);
// open an OST file
using var pst = PersonalStorage.FromFile("Saved File.ost");
// get a calendar folder
var calendarFolder = pst.GetPredefinedFolder(StandardIpmFolder.Appointments);
// add MSG to the calendar folder
calendarFolder.AddMessage(MapiMessage.Load(msgStream));