C# Model to XML

Helper.cs

private static string CreateXml(object model)
        {
            var xmlDoc = new XmlDocument();
            var xmlSerializer = new XmlSerializer(model.GetType());
            using (var xmlStream = new MemoryStream())
            {
                xmlSerializer.Serialize(xmlStream, model);
                xmlStream.Position = 0;
                xmlDoc.Load(xmlStream);
                return xmlDoc.InnerXml;
            }
        }

ModelToXML.cs

var model = ... ;
File.WriteAllText("Path, for example ... model.xml", CreateXml(model));