Try this: create a data model (.edmx) from your database. Edit the model, Adding property and procedures of your Class That You want to add to the database. Finally, update your database from your model (.Edmx) Selecting only the tables and procedures exist That You Have changes.
You can look at those tutorials http://msdn.microsoft.com/en-us/data/gg685494 http://msdn.microsoft.com/en-us/data/gg685489.
EF4 “Code First” enables you to optionally override its default database persistence mapping rules, and configure alternative ways to map your classes to a database.
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