What to do if .NET FRAMEWORK 3.5 is not installed on Windows Server 2019?

Question

Microsoft

The program requires .net framework 3.5 (package with 2.0 and 3.0)! Tried different ways, they all ended in failure. What should I do?! Thank you in advance for your response!

Answer 1

Perhaps the .net framework 3.5 relies on the implementation of older versions of WinAPI, which Windows Server 2019 is not considered to be
System requirements

Supported Operating System
Windows Server 2003, Windows Server 2008 , Windows Vista, Windows XP

You can try installing Mono instead of .NET (after trying it locally first).

Sponsored by Microsoft , Mono is an open source implementation of Microsoft's .NET Framework based on the ECMA standards for C# and the Common Language Runtime.