The .Net Entity framework is a new paradigm introduced by Microsoft which abstracts the way .Net applications communicate with data sources. While this framework in essence represents yet another Object Relational Mapping (ORM) System, together with LINQ (Language Integrated Query) provides .Net developers with powerful data manipulation tools. This presentation focuses on these two technologies, by discussing benefits and drawbacks of using them as well as focusing in a case-study of developing distributed web-service based applications which rely on enormous amounts of data.