public string GenerateXml() { Response.AppendHeader("Access-Control-Allow-Origin", "*"); var operations = BankingSystemDBService.TaskQuery(); foreach (var operation in operations) { operation.ConvertRubToEur(Code, Rate); } XmlService.SaveXmlToFile(XmlService.GenerateXml(operations), XmlFile); return(System.IO.File.Exists(XmlFile) ? $"Файл {XmlFile} создан успешно!" : $"Файл {XmlFile} не найден!"); }