public void RemoveStudentsShouldThrowErrorIfStudentDoesNotExist()
 {
     string name = "Petur Petrov";
     int uniqueNumber = 10002;
     Student student2 = new Student("Goshko", uniqueNumber + 1);
     Student student = new Student(name, uniqueNumber);
     List<Student> students = new List<Student>();
     Course newCourse = new Course(students, "Math");
     newCourse.AddStudent(student);
     newCourse.RemoveStudents(student2);
 }
        public void RemoveStudentsShouldRemoveStudentsThatAlreadyExist()
        {
            string name = "Petur Petrov";
            int uniqueNumber = 10002;
            Student student = new Student(name, uniqueNumber);
            List<Student> students = new List<Student>();
            Course newCourse = new Course(students,"Math");
            newCourse.AddStudent(student);
            newCourse.RemoveStudents(student);

        }