ImWpfUser.xaml

<Window x:Class="ImWpfUser.MainWindow"
        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:ImWpfUser"
        mc:Ignorable="d"
        Title="ImWpf Demo" SizeToContent="WidthAndHeight">
    <Grid x:Name="grid" Height="800" Width="600">
        <Grid.Resources>
            <Style TargetType="{x:Type TextBlock}">
                <Setter Property="TextWrapping" Value="Wrap"/>
            </Style>
            <Style TargetType="{x:Type StackPanel}">
                <Setter Property="Margin" Value="4,4,4,4"/>
                <Setter Property="HorizontalAlignment" Value="Stretch"/>
                <Setter Property="VerticalAlignment" Value="Stretch"/>
                <Setter Property="Width" Value="Auto"/>
                <Setter Property="Height" Value="Auto"/>
            </Style>
            <Style TargetType="{x:Type Button}">
                <Setter Property="HorizontalAlignment" Value="Left"/>
                <Setter Property="Padding" Value="16,4,16,4"/>
                <Setter Property="Margin" Value="4,8,4,8"/>
            </Style>
        </Grid.Resources>
        <Grid.RowDefinitions>
            <RowDefinition Height="*"/>
            <RowDefinition Height="*"/>
        </Grid.RowDefinitions>
        <Grid.ColumnDefinitions>
            <ColumnDefinition Width="*"/>
            <ColumnDefinition Width="*"/>
        </Grid.ColumnDefinitions>
        <Border Background="AntiqueWhite" Grid.Column="0" Grid.Row="0" Grid.RowSpan="2">
            <StackPanel x:Name="ImWpfPanelLeft"/>
        </Border>
        <Border Background="Beige" Grid.Column="1" Grid.Row="0">
            <StackPanel x:Name="ImWpfPanelRight"/>
        </Border>
        <Border Background="Honeydew" Grid.Column="1" Grid.Row="1">
            <StackPanel x:Name="NonImPanel">
                <TextBlock>
                Everything below here has been made through the normal Windows Forms Designer with no hacky workarounds.<LineBreak/><LineBreak/>
                But!<LineBreak/><LineBreak/>
                It can modify values which are displayed in the other panels.
                </TextBlock>
                <Button Click="YIncrBtn_Click">y++</Button>
                <Button Click="RefreshBtn_Click">Refresh Right-hand Panel</Button>
            </StackPanel>
        </Border>
    </Grid>
</Window>