While I was organizing the NHDay, this summer I got in contact with Kay Herzam, one of the founder of the Bern .NET User Group: we started talking and we decided to do something together: the collaboration started with Kay announcing the NHDay to his fellow user group members, and this turned out pretty well, since 5 people from Switzerland registered and came to the NHDay after Kay announced it. We decided to go on with the collaboration: so on December 9th, 2010 I will be speaking in Bern, at the 5th annual user group meeting, about SOLID principles....