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Without these reference assemblies, Visual Studio would assume you are targeting the highest installed framework (e.g., .NET 4.8), leading to builds that fail on machines that only have .NET 4.0 installed.
Visual Studio cannot locate the reference assemblies. Solution:
What are you using for your project?
If you want, I can:
Are you setting up a or a CI/CD build agent ? Share public link microsoft .net framework 4 multi targeting pack
The SDK automatically uses the correct multi-targeting pack for net40 .
Understanding the Microsoft .NET Framework 4 Multi-Targeting Pack If you want, I can: Are you setting
It contains "empty" shells of the libraries.
| Item | Notes | |---|---| | Targeting assemblies | Compile-time only | | Runtime | Not included — install .NET Framework 4 runtime separately | | Visual Studio support | Requires VS that supports targeting packs; newer VS may need manual component install | | CI/CD | Install on build agents or include reference assemblies in toolchain | | Item | Notes | |---|---| | Targeting
Visual Studio may prompt you to reload the project. Troubleshooting and Related Components