Does entity framework track changes on POCOs

Question

Does the entity framework 4.0 track changes on Plain old C# object?

If so, should my class do something special (implement an interface/raise events when changing the value of a property?)

Also, how can I get the state(modified/unchanged, etc) of a POCO? Is there a way to know the "old" values of properties?

Answer 1

I found POCO in the Entity Framework: Part 1 - The Experience by quick googling. See Part 3 – Change Tracking with POCO.

There are two types of change tracking possibilities with POCO: Snapshot based Change Tracking and Notification based Change Tracking with Proxies. In this post, I would like to drill into both options a bit further and cover the advantages and disadvantages of both, along with the implications of using either approach.