Issue Uninstalling .net framework and downgrade higher version to lower version

For a .net project when server admin asked you to downgrade .net project version from higher version like 4.7 to lower version 4.6.1 to support production server

You may get error popup says when you try to install version 4.6.1
“.NET Framework 4.5.x/4.6.x/4.7.x (ENU) or a later version is already installed on this computer.
”
Get more details “https://docs.microsoft.com/en-us/dotnet/framework/install/troubleshoot-blocked-installations-and-uninstallations”

Fix:

Step 1: Uninstall higher version via control panel

Step 2: To install 4.6.1 for a .net project , download developer version and install it
https://www.microsoft.com/en-us/download/details.aspx?id=49978