What is difference between build and rebuild

Build solution: Compiles code files (DLL and EXE) which are changed. Rebuild: Deletes all compiled files and compiles them again irrespective if the code has changed or not. Clean solution: Deletes all compiled files (DLL and EXE file). ... The difference is the way the build and clean sequence happens for every project.

• Build solution will perform an incremental build: if it doesn't think it needs to rebuild a project, it won't. It may also use partially-built bits of the project if they haven't changed (I don't know how far it takes this)
• Rebuild solution will clean and then build the solution from scratch, ignoring anything it's done before. The difference between this and "Clean, followed by Build" is that Rebuild will clean-then-build each project, one at a time, rather than cleaning all and then building all.
• Clean solution will remove the build artifacts from the previous build. If there are any other files in the build target directories (bin and obj) they may not be removed, but actual build artifacts are. I've seen behaviour for this vary - sometimes deleting fairly thoroughly and sometimes not - but I'll give VS the benefit of the doubt for the moment :)