History
Add Graphics Sources
Some simple adjustments

. Add StringComparison.Ordinal parameter for some string searching
methods
. Add StringComparer.Ordinal to the Field index map (faster hash method)
. Minor changes
Removed some invalid <returns> elements
Fields are just set at construction time
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