Save changes with IAuditable

gistfile1.txt

 public override int SaveChanges()
        {
            // var auditUser = HttpContext.Current.User.Identity.Name;
            DateTime auditDate = DateTime.UtcNow;
            foreach (DbEntityEntry<IAuditable> entry in ChangeTracker.Entries<IAuditable>())
            {
                if (entry.State == EntityState.Added)
                {
                    entry.Entity.CreatedOn = auditDate;
                    entry.Entity.ModifiedOn = auditDate;
                    // entry.Entity.CreatedBy = auditUser;
                    // entry.Entity.ModifiedBy = auditUser;
                }
                else if (entry.State == EntityState.Modified)
                {
                    entry.Entity.ModifiedOn = auditDate;
                    // entry.Entity.ModifiedBy = auditUser;
                }
            }
            return base.SaveChanges();
        }