Tile Scaling for Maximum Area Coverage Based Upon Aspect Ratio of Tiles

<Window x:Class="ScalingTiles.MainWindow"
        xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
        Title="Shawn Pavel's Scaling Tiles" Height="350" Width="525">
    <!--Root-->
    <DockPanel>
        <!--
            Children Count Option
            Default is Four 
        -->
        <StackPanel Orientation="Horizontal" VerticalAlignment="Top" DockPanel.Dock="Top">
            <TextBlock Text="Number of Child Rectangles:" VerticalAlignment="Center"/>
            <TextBox x:Name="txtRectangles" Text="4" Margin="5,0" MinWidth="50"  />
        </StackPanel>
        <!--
            Aspect Ratio Option
            Default is 1.33
        -->
        <StackPanel Orientation="Horizontal" VerticalAlignment="Top" DockPanel.Dock="Top">
            <TextBlock Text="Aspect Ratio:" VerticalAlignment="Center"/>
            <TextBox x:Name="txtAspectRatio" Text="1.3333" Margin="5,0" MinWidth="50"/>
            <Button x:Name="btnUpdateRectangles" Content="Update" Click="btnUpdateRectangles_Click" />
        </StackPanel>
        <!--
            Status and Test Info Display
        -->
        <Grid DockPanel.Dock="Top">
            <Grid.RowDefinitions>
                <RowDefinition />
                <RowDefinition />
            </Grid.RowDefinitions>
            <TextBlock x:Name="txtStatus" Text="No status yet" HorizontalAlignment="Center" />
            <TextBlock x:Name="txtMaximized" Text="" HorizontalAlignment="Center" Grid.Row="1"/>
        </Grid>

        <!--    
            WrapPanel to take care of position of the children
        -->
        <Border x:Name="brdRectangles" BorderBrush="Black" BorderThickness="1" Margin="5" CornerRadius="5">
            <WrapPanel x:Name="wpParentContainer" ItemHeight="50" ItemWidth="50" SizeChanged="wpParentContainer_SizeChanged_1" />
        </Border>
    </DockPanel>
</Window>