C# is definetly the perfect language for an open source project like RunUO.
First, it is object oriented. I wouldn't even know where to start coding something like Ultima Online if it couldn't be based on classes.
Second, it is a relatively easy language to understand (if coded properly). Anyone can look at something like "public override AlwaysMurderer{ get{ return true} };" and understand what it means. I know a guy that can code almost anything in UO. Anything. Yet, he doesn't know most of the basics of C#, such as: multi-dimensional arrays, the difference between a reference type and a value type, what internal or sealed classes are, etc.
Third, it can be used on almost any computer running Microsoft.
Also, it is a very safe to use language. The compiler is capable of preventing errors and memory leaks before even running the program.
BTW:
Can't I simply judge on the base of my OOP knowledge, expecially knowing (Do you know?) that C# was born only because MS couldn't use Java anymore and that they're very similar? Of course you think not..
Well, instead of criticizing, why not be constructive? What language would you have written RunUO in? Don't say C or C++, or I will be forced to laugh in your face.... Oh, and who cares if C# is related to Java? It is still a very powerful, complex, flexible, secure, easy to use, internet friendly, and visually oriented object based language. It is being used more and more everyday. C# is going places.
Until you scan your engineering degree along with a valid driver's license, I don't know anything about your OOP knowledge (if any). This is the internet. You could be a five year old looking for an argument. You could be a sixty year old woman with nothing else to do. Then again, so could I.
Heck, I can say I have a masters in mathematics and engineering. I won an Olympic gold medal for swimming too. Oh, I was a four star general in the army, navy, and marine corps as well. Not to mention I was the guy that told George Washington to cross the Delaware River and destroy the Prussian force encamped there. What? That was hundreds of years ago? I was accidently transported back in time during a transporter accident on the starship Enterprise. <- Prove me wrong....