MainWindow.xaml

<Window x:Class="Revert.FileExtensionFixer.MainWindow"
        xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
        Title="File Extension Fixer" Height="350" Width="525">
    <Grid>
        <Grid.RowDefinitions>
            <RowDefinition Height="30"></RowDefinition>
            <RowDefinition Height="20"></RowDefinition>
            <RowDefinition Height="Auto"></RowDefinition>
        </Grid.RowDefinitions>
        <DockPanel LastChildFill="True" Grid.Row="0" Margin="5">
            <Button Name="btnFixExtensions" Content="Fix Extensions" Margin="5 0 5 0" DockPanel.Dock="Right" Click="BtnFixExtensions_OnClick" />
            <Button Name="btnBrowse" Content="Browse" Margin="5 0 5 0" DockPanel.Dock="Right" Click="BtnBrowse_OnClick" />
            <TextBox Name="txtDirectoryPath"></TextBox>
        </DockPanel>
        <CheckBox Name="cbIncludeSubDirectories" Content="Include sub directories?" Grid.Row="1"></CheckBox>
        <ScrollViewer HorizontalScrollBarVisibility="Auto" VerticalScrollBarVisibility="Auto" Name="scrollViewer" Grid.Row="2" Margin="5">
            <TextBlock HorizontalAlignment="Stretch" VerticalAlignment="Stretch" MinWidth="100" Width="{Binding ElementName=scrollViewer, Path=ViewportWidth}"
            TextWrapping="Wrap" Name="txtOutput" />
        </ScrollViewer>

    </Grid>
</Window>