MSB4098: MSBuild is invoking VCBuild to build this project. Project-to-project references between VC++ projects (.VCPROJ) ...

MSB4098: MSBuild is invoking VCBuild to build this project. Project-to-project references between VC++ projects (.VCPROJ) and C#/VB/VJ# projects (.CSPROJ, .VBPROJ, .VJSPROJ) are not supported by the command-line build systems when building stand-alone VC++ projects. Projects that contain such project-to-project references will fail to build. Please build the solution file containing this project instead.