Microsoft Previews Compiler-as-a-Service Software
angry tapir writes "Microsoft will release a Community Technology Preview of a new type of compiler its researchers have been building — code-named Project Roslyn — a company executive announced Thursday. Roslyn is a compiler for C# and Visual Basic with a set of APIs that developers can use to fine-tune their code. It resembles a model developed by the Mono Project, in which the information the compiler generates about a program can be reused as a library."
No, you're not getting it right, this is a service as in a process always running on your computer, not as in a cloud based compiler. The point is your program can dynamically call the compiler with additional source code to be compiled so your program can modify itself even though it's in a relatively static language like C#.