<Choose>
<When Condition="'$(Configuration)' == '16 Debug'">
<ItemGroup>
<Reference Include="RevitAPI">
<HintPath>C:\Program Files\Autodesk\Revit 2016\RevitAPI.dll</HintPath>
</Reference>
<Reference Include="RevitAPIUI">
<HintPath>C:\Program Files\Autodesk\Revit 2016\RevitAPIUI.dll</HintPath>
</Reference>
</ItemGroup>
</When>
<When Condition="'$(Configuration)' == '16 Release'">
<ItemGroup>
<Reference Include="RevitAPI">
<HintPath>C:\Program Files\Autodesk\Revit 2016\RevitAPI.dll</HintPath>
</Reference>
<Reference Include="RevitAPIUI">
<HintPath>C:\Program Files\Autodesk\Revit 2016\RevitAPIUI.dll</HintPath>
</Reference>
</ItemGroup>
</When>
<Otherwise>
<ItemGroup>
<Reference Include="RevitAPI">
<HintPath>C:\Program Files\Autodesk\Revit 2015\RevitAPI.dll</HintPath>
</Reference>
<Reference Include="RevitAPIUI">
<HintPath>C:\Program Files\Autodesk\Revit 2015\RevitAPIUI.dll</HintPath>
</Reference>
</ItemGroup>
</Otherwise>
</Choose>