DesktopBackground.xaml

<UserControl x:Class="WPFDevelopers.Samples.ExampleViews.DesktopBackground"
             xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
             xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
             xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006" 
             xmlns:d="http://schemas.microsoft.com/expression/blend/2008" 
             xmlns:local="clr-namespace:WPFDevelopers.Samples.ExampleViews"
             xmlns:controls="clr-namespace:WPFDevelopers.Samples.Controls"
             mc:Ignorable="d" 
             d:DesignHeight="450" d:DesignWidth="800">
    <controls:CodeViewer Header="{Binding NavigateMenuItem.Name}">
        <Button Content="选择视频" Height="40" Width="120" Click="Button_Click"/>
        <controls:CodeViewer.SourceCodes>
            <controls:SourceCodeModel 
                CodeSource="/WPFDevelopers.SamplesCode;component/ExampleViews/Desktop/DesktopPlayVideo.xaml" 
                CodeType="Xaml"/>
            <controls:SourceCodeModel 
                CodeSource="/WPFDevelopers.SamplesCode;component/ExampleViews/Desktop/DesktopPlayVideo.xaml.cs" 
                CodeType="CSharp"/>
        </controls:CodeViewer.SourceCodes>
    </controls:CodeViewer>
</UserControl>