public virtual void AddField(string className, System.Type fieldType, string fieldName
)
{
NeoDatis.Odb.Core.Layers.Layer2.Meta.MetaModel metaModel = storageEngine.GetSession
(true).GetMetaModel();
NeoDatis.Odb.Core.Layers.Layer2.Meta.ClassInfo ci = metaModel.GetClassInfo(className
, true);
// The real attribute id (-1) will be set in the ci.addAttribute
NeoDatis.Odb.Core.Layers.Layer2.Meta.ClassAttributeInfo cai = new NeoDatis.Odb.Core.Layers.Layer2.Meta.ClassAttributeInfo
(-1, fieldName, fieldType.FullName, ci);
ci.AddAttribute(cai);
storageEngine.GetObjectWriter().UpdateClassInfo(ci, true);
}