On some machines after add reference to assembly in csproj generated the next tag.

<Reference Include="Microsoft.Expression.Interactions">
  <HintPath>..\Libs.SL\Blend\Microsoft.Expression.Interactions.dll</HintPath>
</Reference>

But on some machines generated reference with version, culture, token and processor architecture:

 <Reference Include="Microsoft.Expression.Interactions, Version=5.0.5.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35, processorArchitecture=MSIL">
  <SpecificVersion>False</SpecificVersion>
  <HintPath>..\Libs.SL\Blend\Microsoft.Expression.Interactions.dll</HintPath>
</Reference>

Why is this?

c# .net visual-studio-2010 visual-studio-2012
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