What's wrong with this ContentTemplate? - wpf

Question

I'm getting an error for this content template within a style: "Must specify both Property and Value for Setter." Aren't I doing that?
<Style x:Key="LinkButton" TargetType="Button">
<Setter Property="Template">
<Setter.Value>
<ControlTemplate TargetType="Button">
<ContentPresenter/>
</ControlTemplate>
</Setter.Value>
</Setter>
<Setter Property="ContentTemplate">
<Setter.Value>
<DataTemplate>
<Label x:Name="ContentRoot">
<StackPanel Orientation="Horizontal">
<Viewbox Width="24" Height="24" VerticalAlignment="Center">
<Image x:Name="ButtonImage" Source="{Binding RelativeSource={RelativeSource Mode=FindAncestor, AncestorType={x:Type Button}}, Path=Tag}" />
</Viewbox>
<TextBlock VerticalAlignment="Center" x:Name="ButtonText" Text="{Binding RelativeSource={RelativeSource Mode=FindAncestor, AncestorType={x:Type Button}}, Path=Content}"></TextBlock>
</StackPanel>
</Label>
<DataTemplate.Triggers>
<Trigger Property="IsMouseOver" Value="True">
<Setter TargetName="ButtonText" Property="TextBlock.TextDecorations" Value="Underline"/>
</Trigger>
</DataTemplate.Triggers>
</DataTemplate>
</Setter.Value>
</Setter>
And here is a button that will be using this style:
<Button Name="HelpButton" Style="{StaticResource LinkButton}" Height="30" Content="Help" Tag="Help.png"/>
Thanks!

Answer 1

I have loaded this up and have no such problems. The only problem I see is that your button will never have the style applied. This is because if you want the style applied you need to remove the x:Key from the style. Otherwise if you want the style applied only to the HelpButton, the definition should look like this:
<Button Name="HelpButton" Style="{StaticResource LinkButton}" Height="30" Content="Help" Tag="Help.png"/>
But I cannot see the error you are seeing.