Net Framework 4.0 Targeting Pack ((link))

Microsoft no longer directly distributes a standalone "Targeting Pack" installer for .NET 4.0. It has been replaced, deprecated, and rolled into newer installers.

, you might notice that .NET 4.0 is missing from the list of target frameworks. Microsoft intentionally omitted components for versions 4.0 through 4.5.1 in newer IDEs because they are no longer supported. How to "Bring It Back" (A Modern Story) net framework 4.0 targeting pack