private static void RemoveTumbnail(SKUTreeNode product) { var oldAttachmentGuid = product.GetGuidValue("ProductThumbnail", Guid.Empty); var siteName = (product.Site ?? SiteInfoProvider.GetSiteInfo(product.NodeSiteID)).SiteName; if (oldAttachmentGuid != Guid.Empty) { var oldAttachment = AttachmentInfoProvider.GetAttachmentInfo(oldAttachmentGuid, siteName); if (oldAttachment != null) { AttachmentInfoProvider.DeleteAttachmentInfo(oldAttachment); } } }