How do I clear tracked entities in entity framework

EntityFramework Core 5.0 introduced a new method to clear any tracked changes.

_context.ChangeTracker.Clear();

https://docs.microsoft.com/en-us/dotnet/api/microsoft.entityframeworkcore.changetracking.changetracker.clear?view=efcore-5.0

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;
}

1. Possibility: detach the entry

dbContext.Entry(entity).State = EntityState.Detached;

When you detach the entry the change tracker will stop tracking it (and should result in better performance)

See: http://msdn.microsoft.com/de-de/library/system.data.entitystate(v=vs.110).aspx

2. Possibility: work with your own Status field + disconnected contexts

Maybe you want to control the status of your entity independently so you can use disconnected graphs. Add a property for the entity status and transform this status into the dbContext.Entry(entity).State when performing operations (use a repository to do this)

public class Foo
{
    public EntityStatus EntityStatus { get; set; }
}

public enum EntityStatus
{
    Unmodified,
    Modified,
    Added
}

See following link for an example: https://www.safaribooksonline.com/library/view/programming-entity-framework/9781449331825/ch04s06.html