Why does style TargetType="Window" not work when set from App.xaml?

Question

I'm creating a simple WPF project in VS2013 and I want to apply properties to my main Window. I set them in my App.xaml file like this:

<Application.Resources>
    <Style TargetType="Window">
        <Setter Property="Background" Value="#FF2D2D30" />
    </Style>
</Application.Resources>

The problem is that nothing happens. When I change the TargetType to Grid however, the setter property works just fine. Why does this happen?

Answer 1

It is necessary to add construction in Window:

Style="{StaticResource {x:Type Window}}"

Window in XAML:

<Window x:Class="WindowStyleHelp.MainWindow"
        Style="{StaticResource {x:Type Window}}"
        ...>

Or define Style in resources like this:

xmlns:local="clr-namespace:MyWpfApplication"

<Application.Resources>
    <Style TargetType="{x:Type local:MainWindow}">
        <Setter Property="Background" Value="#FF2D2D30"/>
    </Style>
</Application.Resources>