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POImplicit theme error:The property 'Content' was not found in type 'System.Windows.Controls.Control'
 

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    <p>I have got an error while trying to upgrade our large project to SL4. I didn't write the original theme and my theme knowlege isn't great. In my demo app I have a Label and a LabelHeader(which i have created and is just a derived class from Label with DefaultStyleKey = typeof(LabelHeader);<br> I am styling the LabelHeader like this:</p> <pre><code> &lt;Style TargetType="themeControls:LabelHeader"&gt; &lt;Setter Property="Template"&gt; &lt;Setter.Value&gt; &lt;ControlTemplate&gt; &lt;DataInput:Label FontSize="{TemplateBinding FontSize}" FontFamily="{TemplateBinding FontFamily}" Foreground="{TemplateBinding Foreground}" Content="{TemplateBinding Content}"/&gt; &lt;/ControlTemplate&gt; &lt;/Setter.Value&gt; &lt;/Setter&gt; &lt;Setter Property="FontFamily" Value="Tahoma"/&gt; &lt;Setter Property="FontSize" Value="20"/&gt; &lt;Setter Property="Foreground" Value="Red"/&gt; &lt;/Style&gt; </code></pre> <p>This works in SL3 but in SL4 I get:</p> <p>Error: Unhandled Error in Silverlight Application Code: 2500<br> Category: ParserError<br> Message: The property 'Content' was not found in type 'System.Windows.Controls.Control'.<br> File:<br> Line: 9<br> Position: 168 </p> <p>If I change this: Content="{TemplateBinding Content}" to Content="XXX" Then there is no error but , of course, I get XXX in my label rather than the content I set in XAML on the page</p> <p>Any ideas how I can get this working?</p> <p>Demo project here:</p> <p><a href="http://walkersretreat.co.nz/files/ThemeIssue.zip" rel="noreferrer">http://walkersretreat.co.nz/files/ThemeIssue.zip</a></p> <p>(Apologies for reposting, I have so far got no answers over here: <a href="http://forums.silverlight.net/forums/p/183380/415930.aspx#415930" rel="noreferrer">http://forums.silverlight.net/forums/p/183380/415930.aspx#415930</a>)</p> <p>EDIT The answer provided looks like it will work. An issue has been opened for this issue here: <a href="https://connect.microsoft.com/VisualStudio/feedback/details/561183" rel="noreferrer">https://connect.microsoft.com/VisualStudio/feedback/details/561183</a> </p> <p>vote if you think this is important!</p>
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