The persistence mechanism within LINQ can bite you if you aren’t careful.  The framework will persist a local copy of the data, so be careful when making database edits directly as this can cause the data in the application to become out of sync with the data LINQ believes is available. It is necessary to recycle the application after a [...]

Earlier, my business partner forwarded me a link to a great article by Mircea Trofin that covers, with examples,some great design guidelines for using LINQ and developing/extending with new types, libraries and the like. The article is a great read for those of you who like an architectural view. Check it out: Click Here