public ActionResult Create(Expense expense)
 {
     try
     {
         if (ModelState.IsValid)
         {
             expense.StudentId   = studentManager.GetAllStudents().Where(x => x.Email == User.Identity.Name).FirstOrDefault().StudentId;
             expense.ExpenseDate = DateTime.Now;
             expenseManager.Insert(expense);
             TempData["Msg1"] = "Expense amount saved successfully";
             return(RedirectToAction("Index"));
         }
         else
         {
             return(View("Index"));
         }
     }
     catch (Exception e)
     {
         TempData["Msg"] = "Failed to save expense " + e.Message;
         return(RedirectToAction("Index"));
     }
 }