public MenuWindow()
{
InitializeComponent();
this.Closing += window_Closing;
TextBlock textBlock = new TextBlock();
textBlock.FontSize = 17;
textBlock.TextWrapping = TextWrapping.Wrap;
textBlock.Margin = new Thickness(27, 23, 0, 0);
string content = "hello " + Helper.get_username();
textBlock.Inlines.Add(new Bold(new Run(content)));
MenuCanvas.Children.Add(textBlock);
}