I have a field for a custom document library, that must only be updated from code (event receiver) not from UI. So i set this field ShowInNewForm=“FALSE” and ShowInEditForm=“FALSE”. But this time, in code i cannot access this field. item["MyField"] throws exception that says there is no field like this. But when i remove ShowInNewForm=“FALSE” property in content type, i can access the field and its value inside the code. Is there anybody who knows why does it work like this?