public MainWindow(string userName)
{
InitializeComponent();
Messages = new ObservableCollection<string>();
MessagesBox.ItemsSource = Messages;
this.user = new User() { Username = userName };
this.dManager = new DataManager(this.user);
UserNameLabel.Text = userName;
this.lpoginTime = DateTime.Now;
UpdateMessages();
}
public DataManager(User user)
{
this.user = user;
}