Objective-C is the primary programming language used for writing applications for Apple's operating systems MacOS and iOS. One developer told Hacking with Swift that they like the language because it's "very elegant, concise, and expressive." According to Zip Recruiter, the median salary for an Objective-C developer is $123,422 per year. #8: C# Dos has a hashtag card, and all of the game's number two cards have flexible colors. Jacob Shamsian/INSIDER Microsoft released C# — pronounced like the 'C-sharp' music note — in 2001. It is now most widely used for developing desktop software and video games for Windows. According to Coding Dojo, C# peaked in employability in 2020 but fell nearly parallel to its 2019 ranking this year.