How to do it...

Once the project gets created, follow these steps to add a toolbar in the application window:

1. Open the MainWindow.xaml page from the Solution Explorer.
2. Now, replace the existing Grid with a DockPanel so that we can host the toolbar docking to the top of the window.
3. Add a ToolBarTray element inside the DockPanel and dock it to Top.
4. Add a ToolBar control inside the ToolBarTray and then add a few buttons inside it, as shown in the following XAML markup:

<ToolBarTray DockPanel.Dock="Top"> 
    <ToolBar> 
        <Button Content="B" FontWeight="Bold" 
                Width="20" 
                Click="OnBoldButtonClicked"/> 
        <Button Content="I" FontStyle="Italic" 
                Width="20"/> 
        <Button Width="20"> 
            <TextBlock Text="U"  
                       TextDecorations="Underline"/> 
        &lt...