carmanager-3/CarManagerV2/SafeManager.cs

using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using System.Text;
using System.Threading.Tasks;


namespace CarManagerV2
{
    internal class SafeManager
    {
        public static void initializeFile(string path)
        {
            if (!File.Exists(@path))
            {
                using (StreamWriter writer = new StreamWriter(@path))
                {
                    // Create the file, empty
                    writer.WriteLine();
                }
            }
        }

        public static List<Car> readCars(string path)
        {
            List<Car> cars = new List<Car>();
            using (StreamReader reader = new StreamReader(@path))
            {
                string line;
                while ((line = reader.ReadLine()) != null)
                {
                    // Process the line
                    if (line == "") continue;
                    cars.Add(Car.fromCsvString(line));
                }
            }
            return cars;
        }

        public static void saveCars(string path, List<Car> cars)
        {
            using (StreamWriter writer = new StreamWriter(@path))
            {
                foreach (Car car in cars)
                {
                    writer.WriteLine(car.toCsvString());
                }
            }
        }
    }
}