A WPF component making it easy to show the corresponding XAML for WPF custom styles and controls. It was built out of a need to shows the XAML for the theme library MaterialDesignInXamlToolkit. You can see it working in the demo application for MaterialDesignInXamlToolkit.

1. Install the MSBuild package. PM> Install-Package ShowMeTheXAML.MSBuild This will also install the ShowMeTheXAML package as well.
2. Add the following code in your App.xaml.cs

protected override void OnStartup(StartupEventArgs e)
{
    XamlDisplay.Init();
    base.OnStartup(e);
}

3. (Optional) The default template is pretty basic. For a better looking style add the ShowMeTheXAML.AvalonEdit package. PM> Install-Package ShowMeTheXAML.AvalonEdit In App.xaml include the resource dictionary.

<Application.Resources>
    <ResourceDictionary>
        <ResourceDictionary.MergedDictionaries>
            <ResourceDictionary Source="pack:https://application:,,,/ShowMeTheXAML.AvalonEdit;component/Themes/xamldisplayer.xaml" />
        </ResourceDictionary.MergedDictionaries>
    </ResourceDictionary>
</Application.Resources>

<smtx:XamlDisplay UniqueKey="SomeUniqueString">
  <StackPanel>
    <Button Content="Some Content" />
    <TextBlock Text="Text" />
  </StackPanel>
</smtx:XamlDisplay>