Запись в файл работает некорректно - C#

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.IO;
 
namespace cars_information
{
    class cars
    {
        protected string model;
        protected int price;
        protected int year;
        public cars()
        {
            price = 0;
            model = null;
            year = 0;
        }
        public cars(string mod, int pr, int yr) { model = mod; price = pr; year = yr; }
        public void put_in_file()
        {
            FileStream file = new FileStream("cars_dates.txt", FileMode.Append, FileAccess.Write);
            StreamWriter writer = new StreamWriter(file,Encoding.Unicode);
          while (true)
          {
              Console.Write("Enter a model of car: ");
              model = Console.ReadLine();
              Console.Write("Enter a price of car: ");
              price = Convert.ToInt32(Console.ReadLine());
              Console.Write("enter a price of car: ");
              year = Convert.ToInt32(Console.ReadLine());
              writer.WriteLine(model + " " + price + " " + year);
              if (Console.Read() == 110)
              {
                  break;
              }
          }
          writer.Close();
        }

    }
    class Program
    {
        static void Main(string[] args)
        {
            cars car=new cars();
            car.put_in_file();
        }
    }
}