MainWindow.xaml

<Window x:Class="Ocr.MainWindow"
        xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
        Background="LightSteelBlue" 
        Title="MainWindow" 
        Height="475.167" Width="824.111" WindowStartupLocation="CenterScreen">

    <Grid Margin="5,5">
        <Grid.RowDefinitions>
            <RowDefinition Height="Auto"/>
            <RowDefinition Height="Auto"/>
            <RowDefinition Height="*"/>
            <RowDefinition Height="40"/>
        </Grid.RowDefinitions>
        <Grid.ColumnDefinitions>
            <ColumnDefinition Width="20"/>
            <ColumnDefinition Width="*"/>
            <ColumnDefinition Width="40"/>
            <ColumnDefinition Width="20"/>
        </Grid.ColumnDefinitions>

        <TextBlock Grid.Row="0" Grid.Column="1" Text="Select image to scan for text." FontSize="18" VerticalAlignment="Bottom" Margin="5,10,5,10" TextWrapping="Wrap" Foreground="White" />

        <Grid Grid.Row="1" Grid.Column="1" Grid.ColumnSpan="2" >
            <Grid.ColumnDefinitions>
                <ColumnDefinition Width="*"/>
                <ColumnDefinition Width="Auto"/>
                <ColumnDefinition Width="Auto"/>
                <ColumnDefinition Width="Auto"/>
            </Grid.ColumnDefinitions>
            
            <TextBox x:Name="FilePathTextBox" Grid.Column="0" VerticalContentAlignment="Stretch" />
            <Button x:Name="ChoseImageButton" Grid.Column="1" Width="32" Content="..." HorizontalAlignment="Right" Padding="10,5" Margin="5,0,5,0" Click="OnChoseImageButtonClick" />
            <Button x:Name="ScanImageButton" Grid.Column="2" Content="Scan whole Image" HorizontalAlignment="Right" Padding="10,5" Margin="5,0,5,0" Click="OnScanImageButtonClick" />
            <Button x:Name="ScanRegionsButton" Grid.Column="3"  Content="Scan Regions" HorizontalAlignment="Right" Padding="10,5" Margin="5,0,5,0" Click="OnScanRegionsButtonClick" />
        </Grid>
        
        <Grid Grid.Row="2" Grid.Column="1" Grid.ColumnSpan="2">
            <Grid.ColumnDefinitions>
                <ColumnDefinition/>
                <ColumnDefinition/>
            </Grid.ColumnDefinitions>

            <Image x:Name="Image" Grid.Column="0" Margin="0,10,3,10" Stretch="Fill" />
            <TextBox x:Name="ResultTextBox" Grid.Column="1" Margin="3,10,5,10" Foreground="Black" Background="White" Text="{Binding Result}" />
        </Grid>

        <TextBlock x:Name="ErrorTextBlock" Grid.Row="3" Grid.Column="1" Grid.ColumnSpan="2" Margin="0" Text="{Binding Error}" Foreground="Red" VerticalAlignment="Stretch" />
    </Grid>
</Window>