mono-xbuild is deprecated but there is no replacement

[Aptivi]

After upgrading my installation to 20.04, I decided to remove all repositories and keep the Ubuntu repositories in sources.list as they were not supported to file this report. I ran "sudo apt update" and removed all packages from all repositories that are not Ubuntu.

When I inspected what mono-* packages were installed, I saw that one of them, which is mono-xbuild, is installed. However, when I ran "xbuild", I saw this following line:

>>>> xbuild tool is deprecated and will be removed in future updates, use msbuild instead <<<<

So I went ahead and ran "apt list msbuild" and saw nothing, which is weird considering that xbuild is deprecated and that it recommends to use msbuild, which is not available yet. Even worse, the project that I was building requires at least msbuild 15.0. This is what "xbuild /version" returned:

XBuild Engine Version 14.0
Mono, Version 6.8.0.105
Copyright (C) 2005-2013 Various Mono authors

"lsb_release -rd" output:

Description: Ubuntu 20.04 LTS
Release: 20.04

"apt-cache policy mono-xbuild" output:

mono-xbuild:
  Installed: 6.8.0.105+dfsg-2
  Candidate: 6.8.0.105+dfsg-2
  Version table:
 *** 6.8.0.105+dfsg-2 500
        500 http://sy.archive.ubuntu.com/ubuntu focal/universe amd64 Packages
        100 /var/lib/dpkg/status

ProblemType: Bug
DistroRelease: Ubuntu 20.04
Package: mono-xbuild 6.8.0.105+dfsg-2
ProcVersionSignature: Ubuntu 5.4.0-26.30-generic 5.4.30
Uname: Linux 5.4.0-26-generic x86_64
ApportVersion: 2.20.11-0ubuntu27
Architecture: amd64
CasperMD5CheckResult: skip
CurrentDesktop: ubuntu:GNOME
Date: Wed Apr 29 12:25:08 2020
InstallationDate: Installed on 2019-07-21 (282 days ago)
InstallationMedia: Ubuntu 19.10 "Eoan Ermine" - Alpha amd64 (20190715)
PackageArchitecture: all
SourcePackage: mono
UpgradeStatus: No upgrade log present (probably fresh install)

[Launchpad Janitor (janitor)]

Status changed to 'Confirmed' because the bug affects multiple users.