One of my projects contains a reference to "System.Windows.Interactivity"
<Reference Include="System.Windows.Interactivity, Version=4.0.0.0,
Culture=neutral, PublicKeyToken=31bf3856ad364e35, processorArchitecture=MSIL">
<SpecificVersion>False</SpecificVersion>
</Reference>
I've installed Microsoft Expression Blend SDK for Silverlight 4 and so the file exists and is available at this location:
C:\Program Files (x86)\Microsoft SDKs\Expression\Blend\Silverlight\v4.0\Libraries\System.Windows.Interactivity.dll
However I still receive the following error while building:
The tag 'Interaction.Triggers' does not exist in XML namespace 'http://schemas.microsoft.com/expression/2010/interactivity'.
I don't know what else can I do other than installing Blend SDK. How do I fix my problem?