RequestMessage.cs

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

namespace RoyalMail
{
   public class RequestMessage: LogMessage
    {
        public RequestMessage(Guid guid)
        {
           fileName = string.Format("{0}RoyalMailLog_{1:000}_{2}_Outgoing.txt",
                    Properties.Settings.Default.RoyalMailLog, GetDateStamp(), guid);
        }

        protected override void CreateMessage(Message message, StreamWriter sw)
        {
            Uri requestUri = message.Headers.To;

            HttpRequestMessageProperty httpReq
                = (HttpRequestMessageProperty)message.Properties[HttpRequestMessageProperty.Name];

            sw.WriteLine("{0} {1}", httpReq.Method, requestUri);

            foreach (var header in httpReq.Headers.AllKeys)
            {
                sw.WriteLine("{0}: {1}", header, httpReq.Headers[header]);
            }
        }
    }
}