I have to shift an old project (developed in visual studio 2005 .net framework 2.0) to DevOps. For that purpose I have opened that project in VS2019. Project converted and built successfully, but I noticed that target framework of project is showing as 4. After some research I read this (link is also given below)

visual-studio-multi-targeting-overview
I want to know that on which criteria VS decided to update or change target framework of that project. As .Net framework 2.0 is also supported in VS2019 and I don't want to change / update target framework.
Really appreciate your quick replies.
