System.ServiceModel.Channels.MessageHeader Error

I'm trying to get the following to work on my machine but I get an error (Cannot create an instance of the abstract class or interface 'System.ServiceModel.Channels.MessageHeader')

using System;
using System.IO;
using System.Reflection;

namespace com.companyname.business
{
    /// <summary>
    /// Summary description for SessionCreateRQClient.
    /// </summary>
    class SessionCreateRQClient
    {
        /// <summary>
        /// The main entry point.
        /// </summary>
        [STAThread]
        static void Main(string[] args)
        {
            try 
            {
                // Set user information, including security credentials and the IPCC.
                string username = "user";
                string password = "password";
                string ipcc = "IPCC";
                string domain = "DEFAULT";

                string temp = Environment.GetEnvironmentVariable("tmp");    // Get temp directory
                string PropsFileName = temp + "/session.properties";        // Define dir and file name
                DateTime dt = DateTime.UtcNow;
                string tstamp = dt.ToString("s") + "Z";

                //Create the message header and provide the conversation ID.
                MessageHeader msgHeader = new MessageHeader();
                msgHeader.ConversationId = "TestSession";       // Set the ConversationId

                From from = new From();
                PartyId fromPartyId = new PartyId();
                PartyId[] fromPartyIdArr = new PartyId[1];
                fromPartyId.Value = "WebServiceClient";
                fromPartyIdArr[0] = fromPartyId;
                from.PartyId = fromPartyIdArr;
                msgHeader.From = from;

                To to = new To();
                PartyId toPartyId = new PartyId();
                PartyId[] toPartyIdArr = new PartyId[1];
                toPartyId.Value = "WebServiceSupplier";
                toPartyIdArr[0] = toPartyId;
                to.PartyId = toPartyIdArr;
                msgHeader.To = to;

            //Add the value for eb:CPAId, which is the IPCC. 
            //Add the value for the action code of this Web service, SessionCreateRQ.

                msgHeader.CPAId = ipcc;
                msgHeader.Action = "SessionCreateRQ";
                Service service = new Service();
                service.Value = "SessionCreate";
                msgHeader.Service = service;

                MessageData msgData = new MessageData();
                msgData.MessageId = "mid:20001209-133003-2333@clientofsabre.com1";
                msgData.Timestamp = tstamp;
                msgHeader.MessageData = msgData;

                Security security = new Security();
                SecurityUsernameToken securityUserToken = new SecurityUsernameToken();
                securityUserToken.Username = username;
                securityUserToken.Password = password;
                securityUserToken.Org开发者_运维技巧anization = ipcc;
                securityUserToken.Domain = domain;
                security.UsernameToken = securityUserToken;


                SessionCreateRQ req = new SessionCreateRQ();
                SessionCreateRQPOS pos = new SessionCreateRQPOS();
                SessionCreateRQPOSSource source = new SessionCreateRQPOSSource();
                source.PseudoCityCode = ipcc;
                pos.Source = source;
                req.POS = pos;

                SessionCreateRQService serviceObj = new SessionCreateRQService();
                serviceObj.MessageHeaderValue = msgHeader;
                serviceObj.SecurityValue = security;


                SessionCreateRS resp = serviceObj.SessionCreateRQ(req); // Send the request

                if (resp.Errors != null && resp.Errors.Error != null)
                {
                    Console.WriteLine("Error : " + resp.Errors.Error.ErrorInfo.Message);
                }

                else
                {
                    msgHeader = serviceObj.MessageHeaderValue;
                    security = serviceObj.SecurityValue;

                    Console.WriteLine("**********************************************");
                    Console.WriteLine("Response of SessionCreateRQ service");
                    Console.WriteLine("BinarySecurityToken returned : " + security.BinarySecurityToken);
                    Console.WriteLine("**********************************************");
                    string ConvIdLine = "convid="+msgHeader.ConversationId; // ConversationId to a string
                    string TokenLine = "securitytoken="+security.BinarySecurityToken;   // BinarySecurityToken to a string
                    string ipccLine = "ipcc="+ipcc; // IPCC to a string

                    File.Delete(PropsFileName);     // Clean up
                    TextWriter tw = new StreamWriter(PropsFileName);    // Create & open the file
                    tw.WriteLine(DateTime.Now);     // Write the date for reference
                    tw.WriteLine(TokenLine);        // Write the BinarySecurityToken
                    tw.WriteLine(ConvIdLine);       // Write the ConversationId
                    tw.WriteLine(ipccLine);     // Write the IPCC
                    tw.Close();

                    //Console.Read();
                }

            }
            catch(Exception e)
            {
                Console.WriteLine("Exception Message : " + e.Message );
                Console.WriteLine("Exception Stack Trace : " + e.StackTrace);
                Console.Read();
            }


        }
    }
}

I have added the reference System.ServiceModel and the lines:

using System.ServiceModel;
using System.ServiceModel.Channels;

but I continue to get that error when trying to compile --

Cannot create an instance of the abstract class or interface 'System.ServiceModel.Channels.MessageHeader'

I am using Microsoft Visual Studio 2008 Version 9.0.21022.8 RTM Microsoft .NET Framework Version 3.5 SP1 Professional Edition

Is there another reference I have to add? Or a dll to move over?

I wonder was the code above written for Framework 2.0 only?

Thanks for your help.

---

The error message is correct, you cannot create an instance of that class, it is declared abstract.

http://msdn.microsoft.com/en-us/library/system.servicemodel.channels.messageheader.aspx

See if the static method MessageHeader.CreateHeader will work for you. Note there is several overloads, so pick the best one for you.