If I have questions about building a game using Unity and C#, where is the best place in StackExchange to ask for help?
I found out that the "C#" that runs on Unity is not the same as the "C#" that Microsoft documents. I needed to sort an array, and I have some questions about the Unity API.
It depends. It might be here on GDSE, StackOverflow, Computer Graphics, or possibly others. The general rule I apply is which sort of expert would give the best answer to my problem. If the nature of the question is such that a game developer would give you a better answer, then GDSE is an appropriate place to ask. If it's more of a general programming question, Stack Overflow is probably more appropriate (that being said, GDSE seems to be relaxing the "general programming questions are off-topic" stance somewhat). I initially asked a question here about simplex noise that was on-topic, but later we decided it was better served by CGSE instead.
You should be fine asking questions about both the use of arrays and the general Unity API on this site.
There once was a time when we closed questions that involved generic programming. However, we have loosened this restriction quite considerably, after a good argument made by Josh. I have also seen it said, somewhere, that Stack Overflow is where we send these questions to die, and in retrospect, I whole heartily agree.
There is one caveat: Make sure you still follow the general rules of the site. If you are unfamiliar with them, I suggest having a quick read of "What topics can I ask about?" and "What type of questions should I avoid asking?".
I found out that the "C#" that runs on Unity is not the same as the "C#" that Microsoft documents.
But it is. The language is exactly the same. You will even use a lot of the .NET core classes like String or List. The main difference is that you might be interacting with different APIs.
When you wonder if you should post on Gamedev.SE or Stackoverflow, then you should ask yourself this question: "is it a question which any C# programmer can answer, or is it something you can only answer if you have experience with Unity?".
I needed to sort an array
Sorting arrays is something every developer needs to do once in a while, no matter if they develop games, office tools, web applications or telemetry software for space probes. And no matter in which of these industries you work, if you use C#, you would do it roughly the same way. So this is a question you would ask on stackoverflow (although it would really surprise me if you manage to come up with a question about sorting in C# which isn't already answered on stackoverflow)
and I have some questions about the Unity API.
Now that's a question you would rather ask on Gamedev.SE, because Unity is (almost) exclusively used by game developers. If you are a game developer too, you will likely get a better answer on Gamedev.SE.
Unity programming questions are on topic for GD.SE, but in practice I've found that Unity Answers is a much better resource. Disclaimers:
But in terms of sheer breadth of content, they are the best resource I've found online.
System.Array.Sort(array). AFAIK, that is how you always sorted an array. However, I suspect it comes up asArray.Sort()in documentation, because Microsoft assumes your using theSystemnamespace. I make note of that, here, because if it does solve your problem, I would honestly think the question itself showed a lack of research. Always show research - it might save you a downvote or two. \$\endgroup\$