public async Task<IActionResult> Lectures(int ClassSubjectId)
{
var Lectures = await _LectureRepository.GetLectureBySubject(ClassSubjectId);
if (TempData["Error"] != null)
{
ViewBag.Error = TempData["Error"].ToString();
}
if (TempData["Success"] != null)
{
ViewBag.Success = TempData["Success"].ToString();
}
return View(Lectures);
}