//Деавторизация
 private void ButtonLog_Out_Click(object sender, RoutedEventArgs e)
 {
     Accept = false;
     xDocumentPassword.Element("PassWords").Attribute("Accept").Value = false.ToString();
     PasswordXML.SaveXMLPassword(xDocumentPassword);
     MessageBox.Show("Операция успешна.");
 }
        //Диалоговое окно авторизации
        private void buttonLog_In_Click(object sender, RoutedEventArgs e)
        {
            PassWordWindow passWordWindow = new PassWordWindow();

            if (passWordWindow.ShowDialog() == true)
            {
                if (MethodLog_In(passWordWindow.Login, passWordWindow.PassWord))
                {
                    MessageBox.Show("Авторизация успшешна");
                    Accept = true;
                    xDocumentPassword.Element("PassWords").Attribute("Accept").Value = true.ToString();
                    PasswordXML.SaveXMLPassword(xDocumentPassword);
                }
                else
                {
                    MessageBox.Show("Неверный логин и/или пароль");
                }
            }
            else
            {
                MessageBox.Show("Авторизация не пройдена");
            }
        }
        //Метод регестрации
        private static bool Regestration(string first_name, string second_name, string login, string password)
        {
            var result = from data in xDocumentPassword.Element("PassWords").Elements("Account")
                         select new
            {
                Login       = data.Element("Login").Value,
                Password    = data.Element("PassWord").Value,
                Name        = data.Element("First_Name").Value,
                Second_Name = data.Element("Second_Name").Value
            };

            foreach (var item in result)
            {
                if (item.Login == login)
                {
                    return(false);
                }
            }
            var tempXElementNewAccount = PasswordXML.SetXElement(first_name, second_name, login, password);

            xDocumentPassword.Element("PassWords").Add(tempXElementNewAccount);
            xDocumentPassword.Save("parkingDatePassword.xml");
            return(true);
        }
 public Page1()
 {
     InitializeComponent();
     xDocumentPassword = PasswordXML.GetXDocument();
     Accept            = bool.Parse(xDocumentPassword.Element("PassWords").Attribute("Accept").Value);
 }