PettingZoo/View/MainWindow.xaml

<Window x:Class="PettingZoo.View.MainWindow"
        xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
        xmlns:res="clr-namespace:PettingZoo.Properties"
        xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
        xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
        xmlns:viewModel="clr-namespace:PettingZoo.ViewModel"
        mc:Ignorable="d"
        d:DataContext="{d:DesignInstance viewModel:MainViewModel}"
        Width="800" 
        Height="600"
        ResizeMode="CanResizeWithGrip"
        Style="{StaticResource WindowStyle}"
        Title="{x:Static res:Resources.MainWindowTitle}">
    <DockPanel>
        <ToolBar DockPanel.Dock="Top" ToolBarTray.IsLocked="True">
            <Button Command="{Binding ConnectCommand}" Content="Connect"></Button>
            <Button Command="{Binding DisconnectCommand}" Content="Disconnect"></Button>
            <Separator Style="{StaticResource {x:Static ToolBar.SeparatorStyleKey}}" />
            <Button Command="{Binding ClearCommand}" Content="Clear messages"></Button>
        </ToolBar>
        <StatusBar DockPanel.Dock="Bottom">
            <StatusBarItem>
                <TextBlock />
            </StatusBarItem>
        </StatusBar>
        <Grid Margin="4">
            <Grid.ColumnDefinitions>
                <ColumnDefinition Width="*" />
                <ColumnDefinition Width="Auto" />
                <ColumnDefinition Width="300" />
            </Grid.ColumnDefinitions>
            <ListBox Grid.Column="0" Grid.Row="0" 
                     HorizontalAlignment="Stretch" 
                     ItemsSource="{Binding Messages}" 
                     SelectedItem="{Binding Path=SelectedMessage, Mode=TwoWay}">
                <ListBox.ItemTemplate>
                    <DataTemplate>
                        <Grid>
                            <TextBlock Text="{Binding RoutingKey}"></TextBlock>
                        </Grid>
                    </DataTemplate>
                </ListBox.ItemTemplate>
            </ListBox>
            <GridSplitter Width="5" Grid.Column="1" Grid.Row="0" HorizontalAlignment="Stretch"/>
            <Grid Grid.Column="2" Grid.Row="0">
                <Grid.RowDefinitions>
                    <RowDefinition Height="*"/>
                    <RowDefinition Height="Auto"/>
                    <RowDefinition Height="200"/>
                </Grid.RowDefinitions>
                <Border Grid.Column="0" Grid.Row="0" Style="{StaticResource SidePanel}">
                    <DockPanel>
                        <Label DockPanel.Dock="Top" Style="{StaticResource HeaderLabel}" Content="{x:Static res:Resources.PanelTitleBody}"/>
                        <TextBox 
                            Text="{Binding SelectedMessageBody, Mode=OneWay}" 
                            BorderThickness="0"
                            IsReadOnly="True" 
                            HorizontalScrollBarVisibility="Auto" 
                            VerticalScrollBarVisibility="Auto"/>
                    </DockPanel>
                </Border>
                <GridSplitter HorizontalAlignment="Stretch" Grid.Column="0" Grid.Row="1" Height="5" ResizeDirection="Rows"/>
                <Border Grid.Column="0" Grid.Row="2" Style="{StaticResource SidePanel}">
                    <DockPanel>
                        <Label DockPanel.Dock="Top" Style="{StaticResource HeaderLabel}" Content="{x:Static res:Resources.PanelTitleProperties}"/>
                        <DataGrid ItemsSource="{Binding SelectedMessageProperties}" AutoGenerateColumns="False" IsReadOnly="True" Style="{StaticResource Properties}">
                            <DataGrid.Columns>
                                <DataGridTextColumn Binding="{Binding Key}" Header="{x:Static res:Resources.PropertyName}" Width="100"/>
                                <DataGridTextColumn Binding="{Binding Value}" Header="{x:Static res:Resources.PropertyValue}" Width="*"/>
                            </DataGrid.Columns>
                        </DataGrid>
                    </DockPanel>
                </Border>
            </Grid>
        </Grid>
    </DockPanel>
</Window>