General

I want to change the bitmap effects, what should I do?

Download the DirectX SDK
Compile the .fx file into a .ps file using the following command: "$(DXSDKDIR)Utilities\Bin\x86\fxc.exe" /T ps2_0 /E main /Fo "MyEffect.ps" "MyEffect.fx"
Now, the fx file is updated and Catel should be recompiled

StyleHelper.CreateStyleForwardersForDefaultStyles does not work in Silverlight

Probably, the application resources are defined like this:

<Application xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" 
x:Class="MyApp"> 
  <Application.Resources>
    <ResourceDictionary Source="/CWP.Shared;component/themes/generic.xaml" />
  </Application.Resources>
</Application>

However, Silverlight does not allow to add resources to a ResourceDictionary where the source is set. To be able to use default styles, use this code:

<Application xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" 
x:Class="MyApp"> 
  <Application.Resources>
    <ResourceDictionary>
      <ResourceDictionary.MergedDictionaries>
        <ResourceDictionary Source="/MyApp.Shared;component/themes/generic.xaml" />
      </ResourceDictionary.MergedDictionaries>
    </ResourceDictionary>
  </Application.Resources>
</Application>