Thanks for reporting. 4.2.1.102+dfsg2-5ubuntu1 is in Xenial-proposed, but has not migrated to the official release repo yet. Not sure why, but it might be waiting on transition or otherwise confirmation that all packages using mono still works as expected with the newer version.
** Tags added: upgrade-software-version -- You received this bug notification because you are a member of Desktop Packages, which is subscribed to mono in Ubuntu. https://bugs.launchpad.net/bugs/1528285 Title: outdated version in the repos Status in mono package in Ubuntu: New Bug description: version installed is very far behind the version that is at the following repo http://download.mono-project.com/repo/debian ProblemType: Bug DistroRelease: Ubuntu 16.04 Package: mono-runtime 3.2.8+dfsg-4ubuntu4 ProcVersionSignature: Ubuntu 4.3.0-2.11-generic 4.3.0 Uname: Linux 4.3.0-2-generic x86_64 NonfreeKernelModules: nvidia ApportVersion: 2.19.3-0ubuntu2 Architecture: amd64 CurrentDesktop: GNOME Date: Mon Dec 21 08:34:01 2015 SourcePackage: mono UpgradeStatus: No upgrade log present (probably fresh install) To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/mono/+bug/1528285/+subscriptions -- Mailing list: https://launchpad.net/~desktop-packages Post to : [email protected] Unsubscribe : https://launchpad.net/~desktop-packages More help : https://help.launchpad.net/ListHelp

