Server.DataStorage.LoadNumber C# (CSharp) Méthode

        public static void LoadNumber()
        {
            if (File.Exists(@"C:\Users\Malek\Documents\GitHub\ProjectgroepA1\Server\bin\Debug"))
            {
                var file = File.Open(AppDomain.CurrentDomain.BaseDirectory + "unique_number.txt", FileMode.Open);
                StreamReader reader = new StreamReader(file);
                unique_number = int.Parse(reader.ReadLine());
                reader.Close();
            }
            else
            {
                Console.WriteLine("File bestaat niet");
            }
        }