Hello Vincent,

Here is a litle example :

    class MyEntityServerSaveManager : EntityServerSaveInterceptor  
    {
        protected override bool ExecuteSave()
        {
 
            foreach (var entity in EntityManager.FindEntities(EntityState.Modified).OfType<MyEntity>())
            {

                var oldValue = (string)EntityAspect.Wrap(entity).GetValue("MyStringProperty", EntityVersion.Original);
                var newValue = entity.MyStringProperty;

                if (oldValue != newValue)

                {

                //...
                }

            }
            
            return base.ExecuteSave();
        }
 
    }