I’ve just given it a look, you claim that C# is a clone of Java, I would rather say that it is a bad clone of Java.
C# being a clone of Java is already an insult (not that I disagree), but you dont have to jam your knife into it, Julien =D
I did also say “C# seemed like a complete clone of Java,” which by saying the word seemed meant that when I first saw and used C# I saw it as a clone of Java made only for Windows. Once I used it for awhile I realized it was not a clone and that it can work on other platforms besides Windows.
Microsoft .NET works only under Windows even though it includes versions for mobiles and consoles, not just for computers. Mono .NET implementation is not as complete as Microsoft .NET.
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The main problems with Mono are that it lacks WPF and MoonLight is not completely implemented. You can use Winforms though.
The odd reason your program didn’t work on a SMART Board is maybe that your program didn’t support touch?
I have no way to find out now. It isn’t worth looking into anyway, because I’m not really going to use that program again. I may fix up the style, but besides that I doubt I’ll add anything.
Offtopic, but SMART boards are seriously pieces of junk. Most classrooms in my school have them, but the teachers just use the whiteboard 
We only use them for powerpoints the teacher is lazy and doesn’t want to walk 10 ft
My school is the same as above. Whiteboards seem to be used a lot more, but SMART Boards are always used with power points to prevent walking.
When I was in high school the past 4 years, my teachers all fully utilized their SMART boards and their features. Especially my math teacher, she was a crazy good with the remote tablet to write notes on the board.