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Asked: 2026-05-13T22:31:56+00:00

I’ve got WPF 4 app that has a number of UserControls that share styles

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I’ve got WPF 4 app that has a number of UserControls that share styles in their child controls. So I’m creating a number of styles in my App.xaml as . For example:

<Style x:Key="ViewTitle" TargetType="{x:Type Border}">
    <Setter Property="BorderBrush" Value="LightGray" />
    <Setter Property="HorizontalAlignment" Value="Stretch" />
    <Setter Property="VerticalAlignment" Value="Top" />
</Style>

Then in my UserControls I use StaticResource to reference them, for example:

<Border Style="{StaticResource ViewTitle}">
    <TextBlock Margin="6,3,4,5" FontSize="18" FontWeight="Bold" Foreground="White" HorizontalAlignment="Left" Text="Host Management" />
</Border>

This all works fine. The problem is the Visual Studio 2010 RC is putting a blue squiggly under the StaticResource reference and saying: The resource “ViewTitle” could not be resolved.

What’s up with that? Is this a problem with Visual Studio or am I doing something wrong?

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1 Answer

  1. Editorial Team

    From your note in the comments that “it builds and runs fine,” this is almost certainly a problem with Visual Studio. Unfortunately, the VS WPF designer is infamously buggy, and will often fail to resolve or handle perfectly legal XAML. The only true test, therefore, is to compile and run: annoying, but just something one learns to live with.

    You may find that the Expression Blend designer handles this situation better. Blend aims more at being a visual designer (graphic designers are the main target users) but Blend 3 has significantly improved support for editing XAML source code. It may be worth giving that a try.

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