Just to supplement with a little more precise answer:
You need to either run FxCopCmd.exe with:
fxcopcmd.exe /assemblyCompareMode:StrongNameIgnoringVersion
or modify your Visual Studio project file for each build configuration’s property group, like this:
<PropertyGroup Condition=" '$(Configuration)|$(Platform)' == 'Release|AnyCPU' ">
...
<CodeAnalysisAdditionalOptions>/assemblyCompareMode:StrongNameIgnoringVersion</CodeAnalysisAdditionalOptions>
</PropertyGroup>