public UserDialog(UserViewModel user)
        {
            InitializeComponent();
            user.WindowCloseRequest += () => this.Close();
            this.DataContext = user;
            this.Closing += (sender, args) => user.OnClosing(args);

            Binding passwordBinding = new Binding(Password.Name);
            passwordBinding.Source = user;
            passwordBinding.ValidatesOnDataErrors = true;
            passwordBinding.Mode = BindingMode.TwoWay;
            // you can configure other binding stuff here
            PasswordBox.SetBinding(Password, passwordBinding);
            PasswordBox.Password = user.Password;
        }