How do I rollback changes in Entity Framework?

How do I rollback changes in Entity Framework?

To rollback changes in Entity Framework, you can use the DbContext's ChangeTracker to revert changes or use a transaction.

Can you show me an example of using a transaction for rollback?

Sure! You can wrap your changes in a transaction like this:

using (var transaction = context.Database.BeginTransaction())
{
    try
    {
        // Your data manipulation code here
        context.SaveChanges();
        transaction.Commit();
    }
    catch
    {
        transaction.Rollback();
    }
}

What if I want to rollback specific entities instead of the whole transaction?

You can manually revert changes on specific entities by using the Entry method:

context.Entry(entity).State = EntityState.Unchanged;

Is there a way to undo changes before saving?

Yes, you can use the ChangeTracker to access modified entities and revert their state before calling SaveChanges().