What are some good (or the best!) XMPP/Jabber client libraries for .NET 3.5 or 4.0 development?
I have seen a few decent libraries out there, but most of the good ones seem to be built for Framework 2.0.
(If a Framework 2.0 library is still the best, I'm ok with that. I'm just looking for the best libraries for a new project built on 3.5 or 4.0).
Libraries built on the 2.0 framework should work fine in your 3.5 or 4.0 project, or you could recompile them if you want. Jabber-Net seems to work fine in both of those modes.
Please use MatriX Library for your stuff. The support is really great. Worth it.
Before you buy you could use the trial version and ask for their support in forum.
This is the one I use agsXMPP and have never had a problem with it although admittedly I don't push it that hard.