How do I clear tracked entities in entity framework

Question

I am running some correction code that runs over a big pile of entities, as it progress its speed decreases, that is because the number of tracked entities in the context in

Answer 1

You can add a method to your DbContext or an extension method that uses the ChangeTracker to detach all the Added, Modified, and Deleted entities:

public void DetachAllEntities()
{
    var changedEntriesCopy = this.ChangeTracker.Entries()
        .Where(e => e.State == EntityState.Added ||
                    e.State == EntityState.Modified ||
                    e.State == EntityState.Deleted)
        .ToList();

    foreach (var entry in changedEntriesCopy)
        entry.State = EntityState.Detached;
}