We just released a minor update to the .NET libraries:

1.1.3.0 Features Added conditional Get support. The service object has an overloaded Query method now, that allows you to pass a ifModifiedSince DateTime object into it.s Added Authsub token revocation support. There is a new method revokeToken in AuthsubUtil, similiar to the java class library Bugfixes/changes Issue 93: ReFixed Title Exact Queries for Spreadsheets. Using Title- Exact resulted in two question marks in the query string. Fixed the GeoRSS where extension, which lived in a mistyped namespace. Fixed the Latitude property, which was misspelled Lattitude Added MediaGroup.Contents as a Collection: as there could be more than one. So all previous usages should be changed to access the first element in a collection. The old method will remain in there.

As usual, download from:

http://code.google.com/p/google-gdata/downloads/list

Enjoy