wabbajack/Wabbajack/Views/TextViewer.xaml

<mah:MetroWindow
    x:Class="Wabbajack.TextViewer"
    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:Wabbajack"
    xmlns:mah="http://metro.mahapps.com/winfx/xaml/controls"
    Title="TextViewer"
    Width="800"
    Height="450"
    WindowTitleBrush="{StaticResource MahApps.Brushes.Accent}"
    Style="{StaticResource {x:Type Window}}"
    mc:Ignorable="d">
    <Grid>
        <TextBlock
            Name="TextBlock"
            FontSize="20"
            TextWrapping="Wrap" />
    </Grid>
</mah:MetroWindow>