I had to edit an application which uses your RadScheduler and the appointment in the calendar needs to be dependent on 1-2 messagebox displayed. The first messagebox has OK & Cancel, and if the user clicks Cancel the appointment should not open. The 2nd messagebox shows a message and OK button. When I click OK button for both of the messagebox, sometimes the appointment does not open. When I debug, it works fine. However, after deploying the application, the appointment window does not open intermittently even though OK has been clicked. I put the check in AppointmentEditing method and if OK has clicked, e.Cancel = false; else e.Cancel = true;
As this is intermittent (more chances of it not opening when it should) I am rather puzzled.