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We will be using the same console application that we created in the previous article, so make sure you have read the previous article before we continue.We will be adding three methods to the console application: add Customer(), delete Customer() and modify Customer() Create and Add Objects in Entity Framework 4.0 In order to add new objects to the Entity Set, you must create an instance of an Entity type and add the object to the object context.Note that Entity Framework converts our code into queries that the database understand and handles all data interaction and low-level details.
Entity Framework can be useful for getting up and running quickly with a database application, but when it comes to deployment, EF's built-in data migration feature doesn't inspire confidence.If you're not too familiar with doing reverse Code First, go and find a good tutorial on Entity Framework Code First. Because I know the duplicate is the only order put in today, I do this: Guess what?Then go find one on Reverse Code First (which is doing Code First with an existing database). I just deleted both the duplicate AND the original!I am doing lots of updates on the context and not having any issues, it's only when I try to update this particular entity. For your convenience, I copied the 4 steps from the post that I followed to solve the problem as following: UPDATE: I've gotten a few upvotes on this lately, so I figured I'd let people know the advice I give below isn't the best.