When is SPFile.Properties != to SPFile.Item.Properties in SharePoint?

Question

One of our customers has a problem that we cannot reproduce. We programmatically copy a document\'s properties to a destination file using SPFile.Properties. However, for so

Answer 1

I believe this issue is related to the Sharepoint property promotion/demotion feature which enables document properties to be embedded in the physical MSOffice file and travel with it to the client etc. This however is only supported currently for Office file types (to my knowledge).

Jonathan