public IActionResult StudentInfo(int studentId = 0)
        {
            Student student = new Student();

            if (studentId == 0)
            {
                student.StudentId = 0;
            }
            else
            {
                StudentViewModel svm = new StudentViewModel();
                student = svm.GetStudentByStudentId(studentId);
            }

            return(View(student));
        }