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Model.AdditionalMetaTags.Add("og:url", HttpUtility.HtmlEncode(Request.Url));
Model.AdditionalMetaTags.Add("og:type", "website");
Model.AdditionalMetaTags.Add("og:title", Backup.FacebookTag_Title);
Model.AdditionalMetaTags.Add("og:description", Backup.FacebookTag_Description);
Model.AdditionalMetaTags.Add("og:image", CdnHelper.GetCdnUrl("/images/shared/social/social-default-image.png"));