In a .csproj file, what is for?

Question

How is

different from

?<

Answer 1

I have a project that contains no compilable items (it stores html and javascript for jasmine unit tests).

One day my solution (that contained said project) stopped compiling saying "The target "Build" does not exist in the project".

I added an import to bring in the compiler, which worked fine on my machine but failed using msbuild on the build server.

I then changed a line from

to

and it worked on the build server as well.