Xcodec

does it work with C#?
and what other free and easy developing programs could i find on the OS X?

C# is a .NET technology that isn't natively supported by XCode. .NET traditionally works on Windows only, but through the Mono project you can use C# programs on Linux and OS X as well.

XCode is perfectly happy with Objective-C (the native language of OS X), C and C++.

What are you trying to accomplish?

C# is technically supported through the Mono Project. However, if you're not committed to .NET, you may want to explore a language better supported for OS X such as Objective-C, Java or any variety of scripting language.

well,which easier?
and the second question what other free programing program can i find?

None are necessarily easier - they're just different. What I find easier to work with won't necessarily be easier for someone else and ultimately, it depends on what kinds of things you want to develop (some languages are better suited to certain tasks/environments). Since 99% of them are free, give a few languages a try and decide for yourself.

Thank You