静态方法是否适合Linq To SQL DAL？

I'm using Linq to SQL for my DAL and have heard various things about using static methods in a web application (regarding threading/concurrency issues). At the moment, I created a test DAL, which seems to be functioning fine. However, are there any problems with the way I've created it, since it's static?I'm using Linq to SQL for my DAL and have heard