The new version of the c# wrapper for A7.77 Version 1.1.1.4 is ready to download on it's homepage : http://acknexwrapper.matthias-auer.net
It fixes a bug, where a boolean property, which was assigned with false, threw an exception !
Big thanks go to DJBMASTER for finding this bug!

get the C# wrapper:
for A7.85.4 and A8.30.4, Version 2.3.9
at http://acknexwrapper2.matthias-auer.net/ or visit the thread