does it matter learning main concepts or fundamental concepts of C#.net, asp.net with Old .net version like 3.5 or 4.0?

Advertisements Please suggest to me if it matters to learn c#.net and asp.net`s main concepts or fundamental concepts which I need to work with the company with the old version of the .net framework 3.5 or 4.0 and while working can I learn new concepts with new versions of the.net framework? please help me😥😥 >Solution… Read More does it matter learning main concepts or fundamental concepts of C#.net, asp.net with Old .net version like 3.5 or 4.0?