I looked at what I still had to do and I noticed that you won't have to expect any progress soon.
I don't see a reason for changes like inheriting from the IDisposable class. Unlike sfml which makes calls to the C lib, I made a port and everything should be managed resources. So the code seems finished.
The TextBox won't be written as I will wait for the c++ version to change (the new form builder has a bigger priority).
And copying the c++ documentation is also a lot of work (going from javadoc to the xml docs).
Last but not least, eveything should be tested, but I don't even find the time to do that for the c++ version.
So you can consider the current version as final for now.
The only thing that I actually did in the last few days for the c# version, was buying and setting up a new site for it.
I also added tested the library on a different linux pc and wrote a tutorial for it.
The TGUI.Net library can now be found on
tgui.net.
Edit: Some changes that were made in the c++ version in the last weeks aren't in the c# version yet. So there might be another version coming with these changes, but I won't put a date on it. And everything should remain compatible so when the time comes you can just replace the old dll with the new one.