AS 2019 Re-enter Filename if incorrect

Issue

At the moment, if the user enters a filename that doesn't exist the game produces an error code and then exits. It would be better to add the additional code for the user to be asked again.

SetupBoard

This is the current method for SetupBoard:

        private static void SetUpBoard(string[,] board, int[,] a, int[,] b, ref bool fileFound)
        {
            string fileName = "game1.txt";
            Console.Write("Do you want to load a saved game? (Y/N): ");
            string answer = Console.ReadLine();
            if (answer == "Y" || answer == "y")
            {
                Console.Write("Enter the filename: ");
                fileName = Console.ReadLine();
            }
            try
            {
                StreamReader filehandle = new StreamReader(fileName);
                fileFound = true;
                LoadPieces(filehandle, a);
                LoadPieces(filehandle, b);
                filehandle.Close();
                CreateNewBoard(board);
                AddPlayerA(board, a);
                AddPlayerB(board, b);
            }
            catch (Exception)
            {
                DisplayErrorCode(4);
            }

        }