private static Uri GetElsUrl(string relativePath) { if (!relativePath.Contains("?")) { return (new Uri(string.Concat(ConfigurationManager.AppSettings["ElsOnlineAccountUrl"], relativePath, ApiVersion))); } else { var appendedApiVersion = ApiVersion.Replace("?", "&"); return (new Uri(string.Concat(ConfigurationManager.AppSettings["ElsOnlineAccountUrl"], relativePath, appendedApiVersion))); } }