prs/prs.desktop/DockPanels/DigitalFormsDock.xaml

<UserControl x:Class="PRSDesktop.DigitalFormsDock"
             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="300" d:DesignWidth="300">
    <DockPanel>
        <Border DockPanel.Dock="Top" BorderBrush="Gray" BorderThickness="0.75" Background="WhiteSmoke" Padding="2">
            <DockPanel DockPanel.Dock="Top">
                <Button x:Name="RefreshButton" DockPanel.Dock="Left" Width="25" BorderBrush="Gray" BorderThickness="0.75" Padding="2" Click="RefreshButton_OnClick">
                    <Image Source="../Resources/refresh.png"/>
                </Button>
                <StackPanel x:Name="TypeStack" DockPanel.Dock="Right" Orientation="Horizontal" />
                <ComboBox x:Name="AgeCombo" DockPanel.Dock="Left" Margin="2,0,0,0" SelectionChanged="AgeCombo_OnSelectionChanged" SelectedIndex="0">
                    <ComboBoxItem Content="Today"/>
                    <ComboBoxItem Content="Last 7 Days"/>
                    <ComboBoxItem Content="Last 30 Days"/>
                </ComboBox>
            </DockPanel>
        </Border>
        <local:DigitalFormDockGrid x:Name="Items" DockPanel.Dock="Top" Margin="0,2,0,0"/>
    </DockPanel>
</UserControl>