It is quite widely deployed in many non-software companies of all sizes that build custom software to run their business, and really seems to dominate in small

It is quite widely deployed in many non-software companies of all sizes that build custom software to run their business, and really seems to dominate in small and medium businesses. Its also popular in Game dev mostly due to Unity, but you have other good options to use C# in game dev as well. I can't think of another kind of software company that uses it a lot other than ones that integrate deeply into the microsoft stack. As a language, it was far, far ahead of Java for many years (the long dark tea-time of Java 7).