Implicit xaml style overwritten by explicit style

I Have this very simple xaml style problem in Silverlight4.

When I set a style on element through explicit styling my implicit style is removed? I created a simple example to illustrate the problem.

<UserControl.Resources>
    <Style TargetType="TextBox">
        <Setter Property="Background" Value="red"/>
    </Style>

    <Style TargetType="FrameworkElement" x:Key="test">
        <Setter Property="Margin" Value="20"/>
    </Style>

</UserControl.Resources>

<Grid x:Name="LayoutRoot" Background="White"&开发者_如何学编程gt;
    <TextBox Style="{StaticResource test}" Height="40" Width="120"> </TextBox>
</Grid>
</UserControl>

So when I remove the Style="{StaticResource test} the implicit style is applied again.

Note: this is oversimplified example. So moving the margin to the texbox style is not an option because the real project contains larger xaml styling.

Does somebody know a solution or can confirm that this isn't possible?

Thx in advance!

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Take a look at the BasedOn style property. This will allow you to inherit from a base style, to use the base properties and add some changes.

Now, there is a problem with BasedOn - it can't be used with an implicit style. However, this is pretty easy to work around. This article demonstrates the work around and will also explain the BasedOn property a bit better:

Silverlight how-to: Inherit from an Implicit Style