Ytukyg

I am attempting to add new appointments to a calendar linked using "iCloud for Windows". I have read everything I can find on the subject of Outlook and Calendars on this site and I have used OutlookSpy to navigate through the various objects and folders, (and I thank Dimitry for the huge help he has provided the coding community for this fabulous tool).

However, I am still unable to write to the non-default calendar.

Based on this answer, Creating an appointment to a specific calendar. VBA outlook, here is my code...

using Microsoft.Office.Interop.Outlook

...

Application app = new Application();

AppointmentItem appt = null;



app.ActiveExplorer().CurrentFolder = 

app.GetNamespace("MAPI").GetDefaultFolder(OlDefaultFolders.olFolderCalendar);

Recipient recipent = app.Session.CreateRecipient("Jobs"); 



appt = app.CreateItem(OlItemType.olAppointmentItem);

appt.Subject = "Subject goes here ...";

appt.Location = "Address/Suburb/State";

appt.Body = "Job GPS: " + "-1234567 987654";

appt.Start = DateTime.Now;

appt.End = appt.Start.AddHours(2);



app.ActiveExplorer().CurrentFolder.Items.Add(appt); <--- Fails here

I am uncertain whether it is the fact that the calendar I am wanting to write to is a non-Outlook calendar, or if I simply am missing something prior to attempting to save the appointment.

Any assistance will be greatly appreciated.

MAPIFolder.Items.Add only takes a string (message class) or one of the OlItemType enums (e.g. OlItemType.olAppointmentItem = 1)

You need to use Namespace.GetSharedDefaultFolder instead of GetDefaultFolder, which you only use to reset the actively selected fodler in OUtlook (why?).