If you have an active internet connection and Visual Studio 2017 or newer, you do not need to hunt for a separate net framework 45 developer pack link. You can use the Visual Studio Installer:
This method is the safest and most modern approach. net framework 45 developer pack link
After installation, check:
C:\Program Files (x86)\Reference Assemblies\Microsoft\Framework\.NETFramework\v4.5
for the reference assemblies.
Also check Registry:
HKLM\SOFTWARE\Microsoft\NET Framework Setup\NDP\v4\Full → Release = 378389 If you have an active internet connection and
Once finished, you will see: “Installation is complete.” Click “Finish.” This method is the safest and most modern approach