Is there a flag / property to identify custom content types in SharePoint 2010 ? I know when creating new content types its possible to put them in a group (for exc. custom content types), but is it somehow possible to find out if existing content types are out of the box or custom created ? I mean is there something like a flag or property that can be queried with powershell/console application to find out if a content type is custom ?
Thanks a lot for answers !