public void Update(Employee employee)
 {
     _context.Employees.Attach(employee);
     _context.Entry(employee).State = EntityState.Modified;
     _context.SaveChanges();
 }
 public void Update(CalendarEventType calendarEventType)
 {
     _context.CalendarEventTypes.Attach(calendarEventType);
     _context.Entry(calendarEventType).State = EntityState.Modified;
     _context.SaveChanges();
 }