Restaurant and Waiter project! (WPF - Windows Mobile)

<Window x:Class="Restaurant.ProductPopularityReportWindow"
    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
    MouseDown="Window_MouseDown" Style="{DynamicResource ModalWindowStyle}" 
        xmlns:Restaurant="clr-namespace:Restaurant" Foreground="White"
        Height="450" Width="600" FontFamily="Arial" FontSize="11" WindowStartupLocation="CenterOwner" 
        ShowInTaskbar="False" RenderTransformOrigin="0.5,0.5" x:Name="window" 
        xmlns:d="http://schemas.microsoft.com/expression/blend/2008" Title="Products Popularity Report" 
        xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006" mc:Ignorable="d" 
        xmlns:my="http://schemas.microsoft.com/wpf/2008/toolkit">
    <Window.Resources>
        <!-- ProductNameColumnTemplate -->
        <DataTemplate x:Key="ProductNameColumnTemplate">
            <TextBlock Height="20"  FontFamily="Arial" FontSize="14"  Text="{Binding Path=ProductName}" HorizontalAlignment="Stretch" VerticalAlignment="Center" />
        </DataTemplate>

        <!--UnitNameColumnTemplate-->
        <DataTemplate x:Key="UnitNameColumnTemplate">
            <TextBlock Height="20" FontFamily="Arial" FontSize="14"  Text="{Binding Path=UnitName}" HorizontalAlignment="Stretch"  VerticalAlignment="Center"/>
        </DataTemplate>

        <!--OrderTimeColumnTemplate-->
        <DataTemplate x:Key="OrderTimeColumnTemplate">
            <TextBlock Height="20"  FontFamily="Arial" FontSize="14"  Text="{Binding Path=OrderTime}" HorizontalAlignment="Stretch" VerticalAlignment="Center" />
        </DataTemplate>
        
        <Storyboard x:Key="StoryboardEntrance">
            <DoubleAnimationUsingKeyFrames BeginTime="00:00:00" Storyboard.TargetName="{x:Null}" Storyboard.TargetProperty="(UIElement.RenderTransform).(TransformGroup.Children)[3].(TranslateTransform.Y)">
                <SplineDoubleKeyFrame KeyTime="00:00:00" Value="550" KeySpline="1,0,0,1"/>
                <SplineDoubleKeyFrame KeyTime="00:00:00.5000000" Value="-30" KeySpline="1,0,0,1"/>
                <SplineDoubleKeyFrame KeyTime="00:00:00.7000000" Value="0" KeySpline="0,0,0,1"/>
            </DoubleAnimationUsingKeyFrames>
        </Storyboard>
    </Window.Resources>
    <Window.RenderTransform>
        <TransformGroup>
            <ScaleTransform ScaleX="1" ScaleY="1"/>
            <SkewTransform AngleX="0" AngleY="0"/>
            <RotateTransform Angle="0"/>
            <TranslateTransform X="0" Y="0"/>
        </TransformGroup>
    </Window.RenderTransform>
    <Window.Triggers>
        <EventTrigger RoutedEvent="FrameworkElement.Loaded">
            <BeginStoryboard Storyboard="{StaticResource StoryboardEntrance}"/>
        </EventTrigger>
    </Window.Triggers>
    <Window.CommandBindings>
        <CommandBinding Command="Close"
        Executed="CloseCommand_Executed"/>
    </Window.CommandBindings>
    <Grid>
        <Grid.RowDefinitions>
            <RowDefinition Height="0.122*"/>
            <RowDefinition Height="0.714*"/>
            <RowDefinition Height="Auto"/>
        </Grid.RowDefinitions>
        <my:DatePicker Name="datePickerFromDate" Width="150" HorizontalAlignment="Left" VerticalAlignment="Center" Margin="80,0,0,0" />
        <my:DatePicker Name="datePickerToDate" Width="150" VerticalAlignment="Center" HorizontalAlignment="Left" Margin="280,0,0,0" />
        <TextBlock TextWrapping="Wrap" Foreground="#FFFFFFFF" Text="From Date:" d:LayoutOverrides="Height" VerticalAlignment="Center" HorizontalAlignment="Left" Margin="20,0,0,0"/>
        <TextBlock HorizontalAlignment="Left" Foreground="#FFFFFFFF" Text="To:" TextWrapping="Wrap" d:LayoutOverrides="Height" VerticalAlignment="Center" Margin="250,0,0,0"/>
        <Button Style="{DynamicResource BlueButtonStyle}" HorizontalAlignment="Right" Width="100" Content="Show" Foreground="#FFFFFFFF" x:Name="btnShowResult" Height="26" VerticalAlignment="Center" Margin="0,0,50,0" Click="btnShowResult_Click" />

        <Restaurant:SortableListView  Grid.Row="1"  Margin="6,6,6,0" 
			Background="{x:Null}"  BorderBrush="{x:Null}"
			ScrollViewer.HorizontalScrollBarVisibility="Auto" ScrollViewer.VerticalScrollBarVisibility="Auto"
			VirtualizingStackPanel.IsVirtualizing="True" ScrollViewer.CanContentScroll="True"
			SelectionMode="Single"  IsSynchronizedWithCurrentItem="True"
			ItemContainerStyle="{DynamicResource RestaurantEditListViewItemStyle}"
			Style="{DynamicResource RestaurantEditListViewStyle}" IsEnabled="True"  HorizontalAlignment="Stretch" VerticalAlignment="Top" x:Name="ResultGridView">
            <Restaurant:SortableListView.View >
                <GridView AllowsColumnReorder="False" >
                    <GridViewColumn Width="4" HeaderContainerStyle="{DynamicResource FirstColumnGridViewColumnHeader}" CellTemplate="{StaticResource EmptyColumnTemplate}"/>
                    <Restaurant:SortListViewColumn Header="Product Name" CellTemplate="{StaticResource ProductNameColumnTemplate}"  Width="300" SortProperty="ProductName" SortStyle="RestaurantDataGridViewColumnHeader" HeaderContainerStyle="{DynamicResource RestaurantDataGridViewColumnHeader}" />
                    <Restaurant:SortListViewColumn Header="Unit Name" CellTemplate="{StaticResource UnitNameColumnTemplate}"  Width="130" SortProperty="UnitName" SortStyle="RestaurantDataGridViewColumnHeader" HeaderContainerStyle="{DynamicResource RestaurantDataGridViewColumnHeader}" />
                    <Restaurant:SortListViewColumn Header="Order Time" CellTemplate="{StaticResource OrderTimeColumnTemplate}" Width="140" SortProperty="OrderTime" SortStyle="RestaurantDataGridViewColumnHeader" HeaderContainerStyle="{DynamicResource RestaurantDataGridViewColumnHeader}" />
                    <GridViewColumn Width="4" HeaderContainerStyle="{DynamicResource LastColumnGridViewColumnHeader}" CellTemplate="{StaticResource EmptyColumnTemplate}"/>
                </GridView>
            </Restaurant:SortableListView.View>
        </Restaurant:SortableListView>

        <Button Style="{DynamicResource BlueButtonStyle}" Content="Print" x:Name="btnPrint" Foreground="#FFFFFFFF" Grid.Row="2" Height="26" VerticalAlignment="Top" Width="100" HorizontalAlignment="Center" Click="btnPrint_Click"/>
    </Grid>
</Window>