private bool CanAutoDetectDocumentSetContentType(ContentTypeCollection contentTypes) { var count = contentTypes.Count(x => x.Id.StringValue.StartsWith(DOCUMENT_SET_CONTENT_TYPE_START_ID)); if (contentTypes.Count(x => x.Id.StringValue.StartsWith(DOCUMENT_SET_CONTENT_TYPE_START_ID)) == 1) { return(true); } return(false); }