using System;

using System.IO;

using System.Xml;

​

public static class Program

{

    public static void Main(string[] args)

    {        

        var settings = new XmlWriterSettings {Indent = true};

​

        using (var sw = new StringWriter())

        {

            using (var writer = XmlWriter.Create(sw, settings))

            {

                writer.WriteStartDocument();

​

                writer.WriteStartElement("mzML", @"http://psi.hupo.org/ms/mzml");                

​

                writer.WriteAttributeString("xsi", "schemaLocation", "http://www.w3.org/2001/XMLSchema-instance",

                    "http://psi.hupo.org/ms/mzml http://psidev.info/files/ms/mzML/xsd/mzML1.1.0.xsd");

​

                writer.WriteAttributeString("version", "1.1");

​

                writer.WriteEndElement();

​

                writer.WriteEndDocument();

            }

​

            Console.WriteLine(sw);

        }

    }

}