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In Mono 2.10.4, connecting to a socket with the synchronous "Connect" method works fine, but doesn't work with the async "BeginConnect" method: the supplied async-callback method never gets called. Also, the async-result returned from "BeginConnect" has a wait handle that never finishes waiting either.
The end result is that any code using "BeginConnect" will freeze indefinitely.
Please, attach a small test case that does exactly what your program is doing. I tried a simple test of my own and it worked fine.
Oh interesting. I was running with Mono 2.10.2 when I encountered the bug. I upgraded to 2.10.4 and *thought* the bug was still there, but my MonoDevelop was probably still running things with 2.10.2.
So yeah, it's all good, the bug seems to have been fixed in 2.10.3 or 2.10.4.
Sorry for the trouble.
Woohoo! Thanks for verifying that this was not a problem.