Yesterday I saw your question and regularly looked for it in the hope that someone would answer it. Unfortunately, no one did, the good news, although I found a solution, so I passed it to you.
IIS-ASPNET still exists, and it includes ASP.NET 3.5. You still need IIS-NetFxExtensibility . The difference is that the two now have an additional assumption, NetFx4Extended-ASPNET45 .
So, if you want to enable ASP.NET 3.5, you need: IIS-ASPNET;IIS-NetFxExtensibility;NetFx4Extended-ASPNET45
For ASP.NET 4.5 you need: IIS-ASPNET45;IIS-NetFxExtensibility45;NetFx4Extended-ASPNET45
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