Cannot save calendar item to memory stream (4.5.0)

Hi,

I have tried the following code:

var appointment = Appointment.Load(@"D:\msg\Calendar\1.ics");

using (var memoryStream = newMemoryStream())

{

     appointment.Save(memoryStream, AppointmentSaveFormat.Ics);          

}

However, when you attempt to save the item to the memory stream, it throws a "KeyNotFound" exception.