I know others have "found" the issue an indeed I know where the issue is but it would be nice if the fix was posted as per the second link.
Unsigned BigInt and bit issue Subsonic : Object of type 'System.UInt64' cannot be converted to type 'System.Int64'
Basically I am having the same issues with Unsigned types in SUbSonic3. I know where to fix it I just don't have a clue where to start.
Please help someone who badly needs this fix in the templates :(
The Subsonic project (as well as the Subsonic Templates (separate propject) )is hosted on GitHub -
Somone should already have a fix for this -
http://github.com/subsonic/SubSonic-3.0-Templates/issues/#issue/18