江南白衣

摘要： There are a number of places where you can read an introduction to the Entity Framework, listen to a podcast about it, or watch a screen cast or video of an interview. Even with these various resources, though, there are so many different data access technologies out there that it's not uncommon for me to get the question: Why should I use the Entity Framework? Or what differentiates it from other options like just using ADO.Net SqlClient and friends, LINQ to SQL or something like nHibernate? 阅读全文

摘要： The Entity Framework enables developers to reason about and write queries in terms of the EDM model rather than the logical schema of tables, joins, foreign keys, and so on. Many enterprise systems have multiple applications/databases with varying degrees of normalization, different schema styles depending on the group that developed it, and different naming conventions for tables and columns. Furthermore, in complex systems the entities of interest may be scattered across multiple rows in multi 阅读全文