public ActionResult AssignTeacher(CourseAssign courseAssign)
{
if (!ModelState.IsValid)
{
ViewBag.Departments = departmentBll.GetDepartments();
return(View("AssignTeacher"));
}
ViewBag.Message = courseBll.SaveAssignTeacher(courseAssign);
ViewBag.Departments = departmentBll.GetDepartments();
return(View());
}