MainWindow.xaml

<Window
        xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
        xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
        xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
        xmlns:local="clr-namespace:ChromiumBinariesResolver.Wpf"
        xmlns:Wpf="clr-namespace:DotNetBrowser.Wpf;assembly=DotNetBrowser.Wpf" x:Class="MainWindow"
        mc:Ignorable="d"
        Title="MainWindow" Height="450" Width="800" Closed="MainWindow_OnClosed">
    <Grid>
        <Grid.Resources>
            <BooleanToVisibilityConverter x:Key="VisibleIfTrueConverter" />
        </Grid.Resources>
        <Grid x:Name="Overlay" Panel.ZIndex="1000"
              Visibility="{Binding Path=IsInitializationInProgress, Converter={StaticResource VisibleIfTrueConverter}}">
            <Grid.Background>
                <SolidColorBrush Color="Gray" Opacity=".76" />
            </Grid.Background>
            <StackPanel Orientation="Vertical" HorizontalAlignment="Center" VerticalAlignment="Center"
                        Margin="0 -32 0 0">
                <TextBlock HorizontalAlignment="Center" VerticalAlignment="Center"
                           Text="{Binding Path=InitializationStatus}" FontSize="16" />
            </StackPanel>
        </Grid>
        <Wpf:BrowserView Name ="BrowserView" HorizontalAlignment="Stretch"  VerticalAlignment="Stretch"/>
    </Grid>
</Window>