E-Notebook Enterprise: How to completely uninstall older version of .Net Framework from any Windows system

How can I completely uninstall (even from Registry) older version of .Net Framework from any Windows system?

As we have received multiple request from our customers on how to perform these actions. We want to educate our customers with proper procedures and legitimate tools.

1)navigate to Microsoft support blogs link (as below)
https://blogs.msdn.microsoft.com/astebner/2008/08/28/net-framework-cleanup-tool-users-guide/

Review the whole blog before you download and execute the cleanup tool.