public void CancelMeeting(string meetingId, string cancelMessage)
{
Microsoft.Exchange.WebServices.Data.Appointment meeting = Microsoft.Exchange.WebServices.Data.Appointment.Bind(m_Service, meetingId, new PropertySet(AppointmentSchema.MyResponseType));
if (meeting.MyResponseType == MeetingResponseType.Organizer)
{
meeting.CancelMeeting(cancelMessage);
}
else if (meeting.MyResponseType == MeetingResponseType.Accept || meeting.MyResponseType == MeetingResponseType.NoResponseReceived || meeting.MyResponseType == MeetingResponseType.Tentative)
{
var declineMessage = meeting.CreateDeclineMessage();
declineMessage.Body = new MessageBody(cancelMessage);
declineMessage.SendAndSaveCopy();
}
}