public class SendIdocSample
    {
        internal class MyBodyWriter : BodyWriter, IDisposable
        {
            #region Constructors

            /// <summary>
            /// Initializes a new instance of the BodyWriter class.
            /// </summary>
            /// <param name="stream">The message contents.</param>
            public MyBodyWriter(Stream stream)
                : base(false)
            {
                if (stream == null) throw new ArgumentNullException("stream");
                this.stream = stream;
            }

            #endregion Constructors

            #region IDisposable Members

            /// <summary>
            /// Disposes of the underlying stream.
            /// </summary>
            public void Dispose()
            {
                if (this.stream != null)
                {
                    this.stream.Dispose();
                }
            }

            #endregion

            #region Fields

            /// <summary>
            /// Protected. The message contents.
            /// </summary>
            protected Stream stream;

            #endregion Fields

            #region Methods

            /// <summary>
            /// Protected sealed override. Writes out the contents of the message body.
            /// </summary>
            /// <param name="writer">The XmlDictionaryWriter used to write out the message body.</param>
            protected sealed override void OnWriteBodyContents(XmlDictionaryWriter writer)
            {
                XmlReaderSettings settings = new XmlReaderSettings();
                settings.CheckCharacters = false;
                settings.CloseInput = false;
                using (XmlReader reader = XmlReader.Create(this.stream, settings))
                {
                    reader.MoveToContent();
                    writer.WriteNode(reader, false);
                }
            }

            #endregion Methods
        }

        public static void Main()
        {
            SAPBinding binding = new SAPBinding();
            binding.SendTimeout = new TimeSpan(0, 5, 0);
            binding.AcceptCredentialsInUri = true;

            EndpointAddress outboundaddress = new EndpointAddress(
                "sap://Client=800;lang=EN;User=Developer1;passwd=password@A/ADAPSAP47/00");

            IChannelFactory<IOutputChannel> channelFactory = 
                (IChannelFactory<IOutputChannel>)binding.BuildChannelFactory<IOutputChannel>();
            channelFactory.Open();

            IOutputChannel outputChannel = channelFactory.CreateChannel(outboundaddress);
            outputChannel.Open();

            //MATMAS05.txt contains the idoc data in "flat-file" format,
            //wrapped within the <xml tags>
            //i.e., within the "<SendIdoc xmlns='http://Microsoft.LobServices.Sap/2007/03/Idoc/'><idocData>"
            //and "</idocData></SendIdoc>" tags.
            using (FileStream inputFileStream = new FileStream("MATMAS05.txt",
                FileMode.Open,
                FileAccess.Read))
            {
                using (MyBodyWriter bodyWriter = new MyBodyWriter(inputFileStream))
                {
                    using (Message inputMessage = Message.CreateMessage(MessageVersion.Default,
                        "http://Microsoft.LobServices.Sap/2007/03/Idoc/SendIdoc", //Action
                        bodyWriter))
                    {
                        outputChannel.Send(inputMessage);
                    }
                }
            }

            outputChannel.Close();
            channelFactory.Close();
        }
    }