Incorrect re-serialization after deletion

using System; using System.Collections.Generic; using System.Collections; using System.Linq; using System.Text; using System.Threading.Tasks; using System.IO; using System.Xml.Serialization; using System.Collections.Specialized; using System.Runtime.Serialization.Formatters.Binary; namespace Database { public class Program { static void Main(string[] args) { string line = ""; using (StreamReader sr = new StreamReader("option.ini.txt", System.Text.Encoding.Default)) { line = sr.ReadLine(); } List<Person> employees = new List<Person>(); XmlSerializer xs = new XmlSerializer(typeof(List<Person>)); BinaryFormatter bf = new BinaryFormatter(); if (line == "xml") { if (File.Exists("person.xml")) { using (FileStream fs = new FileStream("person.xml", FileMode.OpenOrCreate)) { List<Person> newEmployees = (List<Person>)xs.Deserialize(fs); Console.WriteLine("Объект десериализован"); employees = newEmployees; } } } if (line == "bin") { if (File.Exists("person.dat")) { using (FileStream fs = new FileStream("person.dat", FileMode.OpenOrCreate)) { List<Person> newEmployees = (List<Person>)bf.Deserialize(fs); employees = newEmployees; } } } if (line == "bin"||line == "xml") { Console.WriteLine("Установите значение bin или xml в файле option.ini.txt"); } while (true) { Console.Clear(); Console.WriteLine("Введите команду:"); string com = Console.ReadLine(); if (com.ToLower() == "exit") { if (line == "xml") { using (FileStream fs = new FileStream("person.xml", FileMode.OpenOrCreate)) { xs.Serialize(fs, employees); } return; } else { using (FileStream fs = new FileStream("person.dat", FileMode.OpenOrCreate)) { bf.Serialize(fs, employees); } return; } } if (com.ToLower() == "allsee") { if (line == "xml") { Console.WriteLine("Имя: {0}, Фамилия: {1}, Табельный номер {2}", string.Join(Environment.NewLine, employees.Select(p => p.Name)), string.Join(Environment.NewLine, employees.Select(p => p.Surname)), string.Join(Environment.NewLine, employees.Select(p => p.PersonnelNumber))); Console.ReadLine(); continue; } if (line == "bin") { Console.WriteLine("Имя: {0}", string.Join(Environment.NewLine, employees.Select(p => p.Name))); Console.ReadLine(); continue; } } if (com.ToLower() == "del") { string n; Console.WriteLine("Name del?"); n = Console.ReadLine(); if (employees.Exists(p => p.Name == n)) { for (int i = 0; i < employees.Count; i++) { if (employees[i].Name == n) { employees.Remove(employees[i]); } } Console.WriteLine("Удаление прошло успешно."); } else { Console.WriteLine("Сотрудника с таким именем не существует!"); } Console.ReadKey(); continue; } if (com.ToLower() == "add") { string name; string surname; string personnelnumber; Console.WriteLine("Введите имя сотрудника:"); name = Console.ReadLine(); Console.WriteLine("Введите фамилию сотрудника:"); surname = Console.ReadLine(); Console.WriteLine("Введите табельный номер сотрудника:"); personnelnumber = Console.ReadLine(); Person p = new Person(name, surname, personnelnumber); employees.Add(p); continue; } if (com.ToLower() != "add") { Console.WriteLine("Доступные команды:"); Console.WriteLine("\tadd создать запись сотрудника"); Console.WriteLine("\texit Выйти и сохранить данные"); Console.WriteLine("\tallsee Выйти и сохранить данные"); Console.ReadKey(); continue; } } } } [Serializable] public class Person { public string Name { get; set; } public string Surname { get; set; } public string PersonnelNumber { get; set; } public Person() { } public Person(string name, string surname, string personnelnumber) { Name = name; Surname = surname; PersonnelNumber = personnelnumber; } } 

}

Hello! When adding employees, the addition is successful. When the program is closed, the serialization to the person.xml file is also successful. The next time you open, it reads. But when deleting an employee, the deletion is also successful, but when exiting, the serialization is already uncorrelated. valentin ivanov 1111 me> valentin ivanov 1111 As a result, when calling any exeption command. How to fix?