<ej-schedule id="Schedule1" width="100%" height="700px" current-view="Month" current-date="new DateTime(2015, 11, 8)" time-zone="UTC +02:00" show-weekend="true" show-quick-window="false" menu-item-click="onMenuItemClick" appointment-template-id="#apptemplate" first-day-of-week="DayOfWeek.Monday" locale="hu-HU" is-responsive="true" allow-drag-and-drop="true"> <e-schedule-tooltip-settings enable="true" template-id="#tooltipTemplate">e-schedule-tooltip-settings> <e-context-menu-settings enable="true"> <e-menu-items> <e-appointment-collection> <e-appointment id="edit" text="Edit" /> <e-appointment id="delete" text="Delete" /> e-appointment-collection> <e-cells-collection> <e-cells id="newEvent" text="New event" /> <e-cells id="NewEvent2" text="New alternative event" /> e-cells-collection> e-menu-items> e-context-menu-settings> <e-categorize-settings enable="true">e-categorize-settings> <e-appointment-settings subject='"Subject"' start-time='"StartTime"' end-time='"EndTime"' description='"Description"' all-day='"AllDay"' recurrence='"Recurrence"' recurrence-rule='"RecurrenceRule"'> <e-datamanager url="@Url.Action("GetRecords","Event", new { area = "admin" })" crud-url="@Url.Action("CrudResult","Event", new { area = "admin" })"/> e-appointment-settings> ej-schedule>
public IActionResult GetRecords(string CurrentView, DateTime CurrentDate, string CurrentAction) { List<ScheduleData> Appoint = new List<ScheduleData>(); Appoint.Add(new ScheduleData { Id = "1", Subject = "Meeting", StartTime = new DateTime(2015, 11, 10, 10, 00, 00), EndTime = new DateTime(2015, 11, 10, 11, 00, 00), Description = "Test", AllDay = false, Recurrence = false, RecurrenceRule = "" }); return Json( new { result = Appoint.ToList(), count = Appoint.Count }) ; }

Yellow line return this:
{"result":[{"id":"1","subject":"Meeting","description":"Test","startTime":"2015-11-10T10:00:00","endTime":"2015-11-10T11:00:00","categorize":null,"roomId":null,"ownerId":null,"priority":null,"allDay":false,"recurrence":false,"recurrenceRule":""}],"count":1}
Red line return is empty value.