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Re:Goodbye to Eclipse – the end of an era as an Eclipse plug... by Rapzid on Saturday February 24, 2018 @05:30PM (#16455838)
C#s compiler is absolutely incremental. In fact, there is all kinds of crazy edit time compilation and JITing going on to support the languages extensibility and the edit and continue features.
Re:Goodbye to Eclipse – the end of an era as an Eclipse plug... by sreque on Saturday February 24, 2018 @06:59PM (#16456242)
Rosyln might support incremental compilation, but, to my knowledge, it's not exposed in visual studio still in any meaningful way. See for instance https://stackoverflow.com/questions/34585588/is-c-sharp-comp....

Compilation in VS occurs at the project level. When you change a single file in the project, the entire project must be recompiled to generate the assembly. Eclipse on the other hand can recompile at the level of individual files, which is way faster, fast enough that it auto-compiles for you on save and the updates the editor with all errors and warnings discovered. No other IDE I am aware of can do this effectively.