//       method to add a student to the list and also to the tf
        public void addStudent()
        {
            String studentType = "";
            String fName       = "";
            String lName       = "";
            String stuId       = "";

            System.Console.WriteLine("Would you like to add a Full Time student [F] or Distant student [D]? (Enter in F or D)");
            studentType = Console.ReadLine();

            while (!(studentType.Equals("F") || studentType.Equals("D")))
            {
                System.Console.WriteLine("Please select 'F' for full time student or 'D' for distant student. ");
                studentType = Console.ReadLine();
            }

            System.Console.Write("Student first name >>");
            fName = Console.ReadLine();

            System.Console.Write("Student last name >>");
            lName = Console.ReadLine();

            System.Console.Write("Student ID >>");
            stuId = Console.ReadLine();

            switch (studentType)
            {
            case "F":
                String campus = "";
                System.Console.Write("Campus >>");
                campus = Console.ReadLine();

                FullTime newFullTime = new FullTime(fName, lName, stuId, campus);
                tfWorker.writeStudentToFile(newFullTime);
                lstFullTime.Add(newFullTime);
                break;

            case "D":
                String facilitator = "";
                System.Console.Write("Facilitator >>");
                facilitator = Console.ReadLine();

                Distant newDistant = new Distant(fName, lName, stuId, facilitator);
                tfWorker.writeStudentToFile(newDistant);
                lstDistant.Add(newDistant);
                break;
            }
        }
//      reads the values from the textfile
        public void readInValues()
        {
            string   line;
            FullTime fullTime = new FullTime();
            Distant  distant  = new Distant();

            try
            {
                StreamReader file = new StreamReader("Students.txt");
                while ((line = file.ReadLine()) != null)
                {
                    var lineParts = line.Split('|');

                    if (lineParts[0].ElementAt(0).Equals('F'))
                    {
                        fullTime = new FullTime(lineParts[1], lineParts[2], lineParts[0], lineParts[3]);
                        lstFullTime.Add(fullTime);
                    }
                    else if (lineParts[0].ElementAt(0).Equals('D'))
                    {
                        distant = new Distant(lineParts[1], lineParts[2], lineParts[0], lineParts[3]);
                        lstDistant.Add(distant);
                    }
                }

                file.Close();
            }
            catch (FileNotFoundException)
            {
                StreamWriter sw = new StreamWriter("Students.txt");
                sw.Close();
            }
            catch (Exception ex)
            {
                Console.WriteLine(ex.ToString());
            }
        }