public ActionResult iCal(int id) {

        MyApp.Event kiEvt = evR.Get(id);

        // Create a new iCalendar
        iCalendar iCal = new iCalendar();

        // Create the event, and add it to the iCalendar
        DDay.iCal.Components.Event evt = iCal.Create<DDay.iCal.Components.Event>();

        // Set information about the event
        evt.Start = kiEvt.event_date;
        evt.End = evt.Start.AddHours(kiEvt.event_duration); // This also sets the duration
        evt.Description = kiEvt.description;
        evt.Location = kiEvt.place;
        evt.Summary = kiEvt.title;

        // Serialize (save) the iCalendar
        iCalendarSerializer serializer = new iCalendarSerializer(iCal);


        System.IO.MemoryStream fs = new System.IO.MemoryStream();

        serializer.Serialize(fs, System.Text.Encoding.UTF8);

        return File(fs, "text/calendar", "MyApp.wyd."+kiEvt.id+".ics");
    }

fs.Seek(0, 0);