I recently discovered via FxCop an unused parameter that was completely
unflagged by ReSharper. It was very simple... a string parameter that
wasn't being passed as an argument to a method that was the sole line (i.e.
the implementation was:
public foo(bunch of parameters, string newString)
return foo(bunch MORE parameters, null);
Where I should have put 'newString' in for the null. Since newString wasn't
being used anywhere, ReSharper really should have flagged it, rather than
letting it slip through until FxCop found it.