Removed some invalid <returns> elements
Fields are just set at construction time
Merge pull request #22 from mcavigelli/DocumentationFixes

Documentation fixes & two resharper suggestions
Add change to generated XML doc.

- should have been part of 8b120c2bfd (applied change to  FileDataLink.cs)
Added unit test to get exception with tiny typo

- asserting whole message seemed to be to much duplication to the implementation
Fixed tiny typos in an exception message
Merge pull request #23 from mcavigelli/DocumentationFixes

Documentation fixes