MainWindow.xaml

<Window x:Class="RouterControlButtonDesigner.MainWindow"
        xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
        xmlns:local="clr-namespace:RouterControlButtonDesigner"
        xmlns:commontools="clr-namespace:Skyline.Common.Tools;assembly=SLCommon"
        xmlns:model="clr-namespace:Skyline.DataMiner.Client.RouterControl.UI.Model;assembly=SLRouterControl"
        SnapsToDevicePixels="True"
        UseLayoutRounding="True"
        TextOptions.TextFormattingMode="Display"
        Title="RouterControlButtonDesigner"
        Height="500" Width="600">
    <Window.Resources>
        <ResourceDictionary>
            <ResourceDictionary.MergedDictionaries>
                <ResourceDictionary Source="pack://application:,,,/RouterControlButtonDesigner;component/CustomTheme.xaml" />
            </ResourceDictionary.MergedDictionaries>
        </ResourceDictionary>
    </Window.Resources>
    <Grid Margin="20" commontools:GridEx.Rows="*;a" commontools:GridEx.Columns="*;*">
        <Grid Grid.Column="0" Margin="20" DataContext="{Binding Input}">

            <!-- add custom attributes to this Button -->
            <Button Style="{DynamicResource {x:Static model:IOButtonBlock.InputStyleKey}}"
                    Content="{Binding}"
                    ContentTemplate="{DynamicResource SkylineLogoTemplate}"
                    />

        </Grid>
        <Grid Grid.Column="1" Margin="20" DataContext="{Binding Output}">

            <!-- add custom attributes to this Button -->
            <Button Style="{DynamicResource CustomOutputButtonStyle}"
                    Content="{Binding}"
                    />

        </Grid>
        <ContentPresenter Grid.Row="1" Grid.Column="0" Margin="20" ContentTemplate="{StaticResource EditorTemplate}" Content="{Binding Input}" />
        <ContentPresenter Grid.Row="1" Grid.Column="1" Margin="20" ContentTemplate="{StaticResource EditorTemplate}" Content="{Binding Output}" />
    </Grid>
</Window>