Not sure why this isn't included in the build but the WindowsLiveAuth sample should be
<!-- Disabled for now, because this project doesn't support rebuild and clean targets.
<ItemGroup Condition="'$(OsVersion)|$(DevToolsVersion)'=='6.2|110'">
<ProjectFile Include="WindowsLiveAuth\dirs.proj"/>
</ItemGroup>
-->
<!-- Disabled for now, because this project doesn't support rebuild and clean targets.
<ItemGroup Condition="'$(OsVersion)|$(DevToolsVersion)'=='6.2|110'">
<ProjectFile Include="WindowsLiveAuth\dirs.proj"/>
</ItemGroup>
-->