The QueryContext type exposes the following members.
SQL Server version information
Windows domain name for the user that executed the query.
Local date/time on the system running the query at the time the query finished executing.
Machine name of the system that generated the query.
Linq-to-SQL provider information
SQL Server session ID
Local date/time on the system running the query at the time the query was started.
Total client to SQL server roundtrip time between start of execution and completion.
User name under which the code that generated the query was running.