I think this relates to the fact that some of the files aren't being correctly
scanned at some point, but I am hovering on a call to a constructor at the
moment that is showing an error in R# (compiles and runs fine).
So, I press to find the constructor - nothing happens
So, I press and find the class (it is there) and press ]]>
- VS throws an exception ArgumentException: element == null
Not caught by R# and not fatal - just shown in a little dialog in VS
So I OK that and manually find the class
Which is FULL of R# errors!!!
I change 1 thing and undo - class goes 'green'
Back in original file everything is now ok
<Ctrl-B> and <Ctrl-N> now work fine!