using System;

using System.Xml;

using System.Xml.Linq;

​

public class Program

{

    public static void Main()

    {

            XNamespace soap = "http://schemas.xmlsoap.org/soap/envelope/";

            XNamespace xsi = "http://www.w3.org/2001/XMLSchema-instance";

            XNamespace xsd = "http://www.w3.org/2001/XMLSchema";

            XNamespace customNs = "http://www.mind.ch";

        var body = new XElement(customNs + "FakeBody");

          var soapXml = new XElement( customNs + "MovimentoMagazzino"                                    

                                     , body);

        var soapBody = new XElement(soap + "Body", soapXml);

            XElement soapEnvelope = new XElement(soap + "Envelope",

                                   new XAttribute(XNamespace.Xmlns + "xsi", xsi),

                                   new XAttribute(XNamespace.Xmlns + "xsd", xsd),                                   

                                   new XAttribute(XNamespace.Xmlns + "soap", soap),                                                  

                                   soapBody

                                   );

         XDocument soapXmlDocument = new XDocument(new XDeclaration("1.0", "UTF-8", null), soapEnvelope);

        Console.WriteLine(soapXmlDocument.ToString());

    }

}