public ActionResult UnassignCourse(CourseAssign courseAssign) { if (!cAssignManager.GetAllassignCourse()) { bool IsCourseUnassigned = cAssignManager.UnassignCourse(courseAssign); if (IsCourseUnassigned) { ViewBag.Message = "All courses are Unassigned successfully"; } else { ViewBag.errorMessage = "All courses failed to Unassign"; } } else { ViewBag.errorMessage = "All courses already Unassigned"; } return(View()); }