Hi Bob,
Thanks for posting!
Auto-properties do not have debugging information generated for them by the compiler (i.e., you'll notice that you can't set breakpoints on them). Because of this, it's impossible for NCrunch to instrument them to retrieve code coverage information.
NCrunch will only calculate the code coverage percentage based on the 'compiled lines' as shown in the Metrics View column, which includes only the lines of code that have a coverage marker next to them. Can you think of any other reason why your files may not be showing code coverage? Are they perhaps consisting of files without markers? (i.e. simply data containers).
Cheers,
Remco