Черный фон окна WPF

Я создал простое окно и применил к нему стиль. Теперь, когда я запускаю приложение, фон черный:

В XAML это выглядит нормально:

What is causing this?

Here is XAML code:

<Window SizeToContent="WidthAndHeight" 
                  xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" 
                  xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
                  x:Class="WPFTest.MainWindow">
    <Window.Style>
        <Style TargetType="Window">
            <Setter Property="Control.Template">
                <Setter.Value>
                    <ControlTemplate TargetType="Window">
                        <Grid Name="LayoutRoot" HorizontalAlignment="Stretch" VerticalAlignment="Stretch">
                            <Grid.RowDefinitions>
                                <RowDefinition Height="*" />
                                <RowDefinition Height="Auto" />
                            </Grid.RowDefinitions>

                            <Grid Grid.Row="0">
                                <ContentPresenter />
                            </Grid>
                            <StatusBar Name="statusBar1" Height="23" HorizontalAlignment="Stretch" VerticalAlignment="Top" Grid.Row="1" />
                        </Grid>
                    </ControlTemplate>
                </Setter.Value>
            </Setter>
        </Style>
    </Window.Style>
    <Grid>
        <Grid Height="114" HorizontalAlignment="Center" Margin="1,0,557,622" Name="grid" VerticalAlignment="Bottom" Width="466">
            <Grid.ColumnDefinitions>
                <ColumnDefinition Width="Auto" />
                <ColumnDefinition Width="100*" />
            </Grid.ColumnDefinitions>
            <Grid.RowDefinitions>
                <RowDefinition Height="25*" />
                <RowDefinition Height="25*" />
                <RowDefinition Height="25*" />
                <RowDefinition Height="25*" />
            </Grid.RowDefinitions>
            <Label Content="Label4" Grid.Column="0" Grid.Row="3" HorizontalAlignment="Left" Margin="3,0,3,0" MinHeight="16" MinWidth="97" Name="xResourceLabel4" VerticalAlignment="Bottom" />
            <Label Content="Label1" Grid.Column="0" Grid.Row="0" HorizontalAlignment="Left" Margin="3,0,3,0" MinHeight="16" MinWidth="98" Name="xResourceLabel1" VerticalAlignment="Bottom" />
            <Label Content="Label2" Grid.Column="0" Grid.Row="1" HorizontalAlignment="Left" Margin="3,0,3,0" MinHeight="16" MinWidth="114" Name="xResourceLabel2" VerticalAlignment="Bottom" />
            <Label Content="Label3" Grid.Column="0" Grid.Row="2" HorizontalAlignment="Left" Margin="3,0,3,0" MinHeight="16" MinWidth="80" Name="xResourceLabel3" VerticalAlignment="Bottom" />
            <TextBox Background="#FFFFFF99" Grid.ColumnSpan="2" HorizontalAlignment="Center" Margin="120,0,189,0" MinHeight="23" MinWidth="157" Name="tbREGNR" VerticalAlignment="Bottom" />
            <TextBox Background="#FFFFFF99" Grid.Column="1" Grid.Row="1" HorizontalAlignment="Center" Margin="0,0,189,0" MinHeight="23" MinWidth="157" Name="tbFaFabnr" VerticalAlignment="Bottom" />
            <ComboBox Background="#FFFFFF99" DisplayMemberPath="" Grid.Column="1" Grid.Row="2" HorizontalAlignment="Center" Margin="0,0,189,0" MinHeight="24" MinWidth="157" Name="cb" SelectedValuePath="" VerticalAlignment="Bottom" />
            <TextBox Background="#FFFF99CC" Grid.Column="1" Grid.Row="3" HorizontalAlignment="Center" Margin="0,0,175,0" MinHeight="23" MinWidth="171" Name="tbComp" VerticalAlignment="Bottom" />
        </Grid>
    </Grid>
</Window>