prs/prs.desktop/Panels/Jobs/InvoiceGrid.xaml

<UserControl x:Class="PRSDesktop.InvoiceGrid"
             xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
             xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
             xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
             xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
             xmlns:local="clr-namespace:PRSDesktop"
             mc:Ignorable="d"
             d:DesignHeight="450" d:DesignWidth="800">
    <Grid>
        <Grid.ColumnDefinitions>
            <ColumnDefinition Width="450" />
            <ColumnDefinition Width="*" />
            <ColumnDefinition Width="*" />
        </Grid.ColumnDefinitions>
        <Grid.RowDefinitions>
            <RowDefinition Height="*" />
            <RowDefinition Height="2*" />
        </Grid.RowDefinitions>
        <local:InvoiceListGrid x:Name="Invoices" Grid.Column="0" Grid.Row="0" Grid.RowSpan="2" />
        <local:InvoiceLineGrid x:Name="Lines" Grid.Column="1" Grid.Row="0" Grid.ColumnSpan="2" Margin="5,0,0,0" />
        <local:InvoicePartsGrid x:Name="Parts" Grid.Column="1" Grid.Row="1" Margin="5,5,0,0" />
        <local:InvoiceTimeGrid x:Name="Time" Grid.Column="2" Grid.Row="1" Margin="5,5,0,0" />
    </Grid>
</UserControl>