protected override bool IsValueChanged(string propertyName)
{
var prop = DbEntry.Property(propertyName);
var propertyType = DbEntry.Entity.GetType().GetProperty(propertyName).PropertyType;
object originalValue = OriginalValue(propertyName);
Comparator comparator = ComparatorFactory.GetComparator(propertyType);
var changed = prop.IsModified && !comparator.AreEqual(CurrentValue(propertyName), originalValue);
return(changed);
}
