public IActionResult AssignmentView(int assignmentId, AssignmentSubmit assignmentSubmit)
{
Assignment assignmentDb = _appDbContext.Assignments.Where(a => a.id == assignmentId).SingleOrDefault();
var assignmentSubmitVM = new AssignmentSubmitViewModel
{
AssignmentSubmit = assignmentSubmit,
Assignment = assignmentDb
};
return(View(assignmentSubmitVM));
}