writing and saving as CSV records to a file

static void Main(string[] args)
        {
            //The MAXPLAYERS constant is the physical table size
            const Int32 MAXCONTACTS = 23;

            //Declare the player tables

            Contact[] contacts = new Contact[MAXCONTACTS];

            //Keep track of the actual number of players (i.e. logical table size)
            Int32 contactCount = 0;
            Int32 number = 0;
            String lastName = " ";
            String phoneNumber = " "; 
            String emailAddress = " "; 

            String firstName = " "; ;

            Console.WriteLine("Contact List");
            // display the menu to the user
            Console.WriteLine("Enter option or M for menu:");
            //Main Driver
            char menuItem;
            menuItem = GetMenuItem();
            while (menuItem != 'X')
            {

                ProcessMenuItem(menuItem, firstName, lastName, phoneNumber, emailAddress, contacts, ref contactCount, MAXCONTACTS);
                menuItem = GetMenuItem();
               
            }
            Console.WriteLine("\nThank you, goodbye");
            Console.ReadLine();
        }
        static char GetMenuItem()
        {
            char menuItem;
            DisplayMenu();
            menuItem = IOConsole.GetChar((Console.ReadLine()));

            while (menuItem != 'C'
                && menuItem != 'L' && menuItem != 'X' && menuItem != 'R' && menuItem != 'U' && menuItem != 'D')
            {
                Console.WriteLine("\nError - Invalid menu item");
                DisplayMenu();
                //menuItem = IOConsole.GetChar((Console.ReadLine()));
            }
            return menuItem;
        }

        static void DisplayMenu()
        {
           Console.WriteLine("C-> Create Contacts");
           Console.WriteLine("R-> Remove Contacts");
           Console.WriteLine("U-> Update Contacts");
           Console.WriteLine("D -> Load data from file");
           Console.WriteLine("S-> Save data to file");
           Console.WriteLine("L-> View sorted by last name");
           Console.WriteLine("F-> View sorted by first name");
           Console.WriteLine("P-> View by partial name search");
           Console.WriteLine("T-> View by contact type");
           Console.WriteLine("Q-> Quit");
        }

        //Routes to the appropriate process routine based on the user menu choice
        static void ProcessMenuItem(Char menuItem, String firstName, String lastName, String phoneNumber,
            String emailAddress, Contact[] contacts, ref Int32 contactCount, Int32 MAXCONTACTS)
        {
            switch (menuItem)
            {
                case 'C':
                    createContact();
                    break;
                case 'R':
                    removeContact();
                    break;
                case 'U':
                    updateContact();
                    break;
                case 'D':
                    LoadToFile();
                    break;
                case 'S':
                    saveToFile();
                    break;
                    
                case 'L':
                    sortByLastName();
                    break;
                case 'F':
                    sortByFirstName();
                       break;
                case 'P':
                       
                       break;
                case 'T':
                       
                       break;
                case 'Q':
                       
                       break;

            }                   
        }


        public static void saveToFile()
        {

        }
        public static void LoadToFile()
        {

        }