public static void WriteSWPlanets(string fileName, List <SWPlanets> sw) { if (File.Exists(fileName)) { using (FileStream fs = new FileStream(fileName, FileMode.Append, FileAccess.Write)) //allows appends to files without reading the entire doc and writing on to it. { var newSWP = new SWPlanets(); Console.WriteLine("First enter in a planet name"); newSWP.Name = Console.ReadLine(); Console.WriteLine("Now enter in an rotational period, enter 0 if unknown. No letters!"); ReadRotation : if (Int32.TryParse(Console.ReadLine(), out int Rotation) && Rotation >= 0) //parses selection, the following code then attaches the newSWP and the selected values to a SWPlanet object. { newSWP.Rotation_period = Rotation; } else { Console.WriteLine("Please enter a valid selection..." + "\ntry and not enter too many zeros! No negatives!"); goto ReadRotation; } Console.WriteLine("Now enter in an orbital period, enter 0 if unknown. No letters!"); ReadOrbit : if (Int32.TryParse(Console.ReadLine(), out int Orbit) && Orbit >= 0) { newSWP.Orbital_period = Orbit; } else { Console.WriteLine("Please enter a valid selection... " + "\ntry and not enter too many zeros! No negatives!"); goto ReadOrbit; } Console.WriteLine("Now enter in a Diameter in km, enter 0 if unknown. No letters!"); ReadDiameter : if (Int32.TryParse(Console.ReadLine(), out int Diameter) && Diameter >= 0) { newSWP.Diameter = Diameter; } else { Console.WriteLine("Please enter a valid selection... " + "\ntry and not enter too many zeros! No negatives!"); goto ReadDiameter; } Console.WriteLine("Now enter in Climate information, in order to correctly submit multiple entries," + "\nplease key as comma seperated values without spaces- I.E. - temperate,arctic"); newSWP.Climate = Console.ReadLine(); Console.WriteLine("Please enter the graviational constant. If unknown, please type 0"); newSWP.Gravity = Console.ReadLine(); Console.WriteLine("Now enter in Terrain information, in order to correctly submit multiple entries, " + "\nplease key as comma seperated values without spaces- " + "\nI.E. -mountains,seas,grasslands,deserts"); newSWP.Terrain = Console.ReadLine(); Console.WriteLine("Please enter in the percentage of the planet covered in water " + "\nrepresented as an integer, if unknown, please type 0"); ReadWater : if (Int32.TryParse(Console.ReadLine(), out int Water) && Water >= 0) { newSWP.Surface_water = Water; } else { Console.WriteLine("Please enter a valid selection... " + "\ntry and not enter too many zeros! No negatives!"); goto ReadWater; } Console.WriteLine("Please key the population as a whole number. If unknown, please put 0."); ReadPopulation : if (Int64.TryParse(Console.ReadLine(), out Int64 Population) && Population >= 0) { newSWP.Population = Population; } else { Console.WriteLine("Please enter a valid selection... " + "\ntry not to put too many zeros! No negatives!"); goto ReadPopulation; } Console.WriteLine($"Confirm you would like to add {newSWP.Name} as a planet. Key Y to confirm, Key anything else to cancel and return to the main menu"); if (Confirmations.Confirm()) //calls the confirmation method to check to see if user confirms. { var newPlanet = String.Join(",", newSWP.Name, newSWP.Rotation_period, newSWP.Orbital_period, newSWP.Diameter, $"\"{newSWP.Climate}\"", newSWP.Gravity, $"\"{newSWP.Terrain}\"", newSWP.Surface_water, newSWP.Population); //Joins the objects attributes. Adds double quotations to fields that could have additional commas. using (StreamWriter sww = new StreamWriter(fs)) { sww.WriteLine($"{newPlanet}"); //appends string to the end of the csv. } } else { MainMenu.DisplayMainMenu(); } Console.Clear(); Console.WriteLine($"{newSWP.Name} has been created."); } } MainMenu.DisplayMainMenu(); }