there is no sln file at all in the svn
I don't see any actual core RunUO developers on the RunUO Google Code project. I only see Ryan, Eos, and Kraz. The 2.3 "release" on the Google Code project appears to have been arbitrarily uploaded by someone named Xavier. It doesn't even have a 2.3 build inside of it. The included build is versioned "2.2.4782". https://github.com/runuo is msturgill's repository. I am assuming this is Mark. I also recognize some of the other names (Derrick, Vorspire, etc). Making 2.4 the last .NET 2.0 release makes sense from a maintenance standpoint. Windows XP EOLs in April anyway.