Entity Framework Update check if the record has changed
===

I am updating a database table using EF.

Its a simple scenario in connected mode.

I get the row I want to update

    var order = from o in Orders
            where o.ID = 1
            select o;

I then update the record as:

    order.FirstName = "First";
    order.LastName = "Last";
    context.SaveChanges();

It works fine. EF checks if the field has changed and only updates the field if its a new value. I have enabled CDC on my SQL server to check that EF does not rewrite to the database if the value has not changed.

Now I want to put this check in my code for additional logic i.e. I want EF to tell me when the record was updated, and when it was not (because the value has not changed). 
Can anyone please tell if there is a way?

I do not want to manually check each field as I have a lot of fields to compare.

Thanks
     