The multi-targeting pack includes specific files that integrate directly with your build tools.
Visual Studio/MSBuild cannot find the reference assemblies. microsoft .net framework 4 multi targeting pack
This warning states that reference assemblies for the framework were not found. You can fix this by explicitly defining the framework path in your environment variables or installing the corresponding developer pack. Summary of Benefits Write code for any .NET 4.x version seamlessly. Lightweight Footprint Avoid installing full, heavy older runtimes. Build Automation heavy older runtimes. Build Automation