Linq to SQL DataContext Lifetime Management

http://www.west-wind.com/weblog/posts/246222.aspx

http://blogs.msdn.com/dinesh.kulkarni/archive/2008/04/27/lifetime-of-a-linq-to-sql-datacontext.aspx

http://stackoverflow.com/questions/337763/linq-to-sql-multiple-single-dbml-per-project

http://stackoverflow.com/questions/1949/are-multiple-datacontext-classes-ever-appropriate

http://stackoverflow.com/questions/1127283/linqtosql-mapping-out-the-datacontext-with-lots-of-tables