How to clean-up an Entity Framework object context?

Daniel’s answer worked for me, however the EntityFramework API is different in version 6+. Here is a method I added to my custom repository container that will detach all entities from the DbContext’s ChangeTracker:

    /// <summary>
    /// Detaches all of the DbEntityEntry objects that have been added to the ChangeTracker.
    /// </summary>
    public void DetachAll() {

        foreach (DbEntityEntry dbEntityEntry in this.Context.ChangeTracker.Entries().ToArray()) {

            if (dbEntityEntry.Entity != null) {
                dbEntityEntry.State = EntityState.Detached;
            }
        }
    }