To apply the Infragistics WPF Metro Light theme to your WPF application, paste the following code into your App.xaml

    <Application.Resources>
        <ResourceDictionary>
            <ResourceDictionary.MergedDictionaries>
                <ResourceDictionary Source="Themes/Metro/Metro.MSControls.Core.Implicit.xaml" />
                <ResourceDictionary Source="Themes/Metro/Metro.MSControls.Toolkit.Implicit.xaml" />
            </ResourceDictionary.MergedDictionaries>
        </ResourceDictionary>
    </Application.Resources>