I have R# 256 in VS2005 and a project that uses the Microsoft Data
Application Block. Frequently, when I load a particular project that
reference won't be recognized (i.e., "using" reference is highlighted in red
and the calls to classes in that lib are marked as "cannot resolve") and I
end up having to either blow away the R# project cache and reload or drop
and reload the reference to the block. This doesn't seem to happen for any
of my other project references and I've seen it now for several builds. Any
idea what might be going on?