What is the importance of EDMX file in entity framework? Share on Facebook Share Share on TwitterTweet Share on LinkedIn Share EDMX (Entity Data Model XML) is a XML file which contains all mapping details of how your objects map with SQL tables. The EDMX file is further divided in to three section CSDL , SSDL and MSL. Importance of EDMX file in entity framework Share on Facebook Share Share on TwitterTweet Share on LinkedIn Share Related posts: Can you explain CSDL, SSDL and MSL section in EDMX file? What is the importance of T4 in Entity framework? What is code first approach in entity framework? What are POCO classes in Entity framework?