public MainWindow()
{
InitializeComponent();
users = new ObservableCollection<User>();
this.tvUsers.ItemsSource = users;
sysConfig = ConfigHelper.GetInstanceFromConfig<SysConfig>();
this.gridUser.DataContext = sysConfig;
}
private void Window_Closed(object sender, EventArgs e)
{
SysConfig sys = this.gridConfig.DataContext as SysConfig;
ConfigHelper.SetInstanceToConfig <SysConfig>(sys);
}