C#

<code>
   public class TcpConnection {

        public delegate void ReceiveDataEventHandler( byte[] e );
        public event ReceiveDataEventHandler ReceiveData;
        public Socket m_connectionSocket;
        public byte[] m_receiveBuffer;


        public TcpConnection() { 
            m_connectionSocket = new Socket(AddressFamily.InterNetwork,SocketType.Stream,ProtocolType.Tcp);
        }


        public void startReceiving() {
            m_receiveBuffer = new byte[ m_connectionSocket.ReceiveBufferSize ];
            m_connectionSocket.BeginReceive( m_receiveBuffer, 0, m_receiveBuffer.Length,
                    SocketFlags.None, new AsyncCallback( receiveDataBytes ), m_connectionSocket );
        }


        private void receiveDataBytes( IAsyncResult asyncResult ) {

            Socket thisSocket = ( Socket ) asyncResult.AsyncState;

            int dataBufferLength = thisSocket.EndReceive( asyncResult );

            byte[] dataBuffer = new byte[ dataBufferLength ];

            Array.Copy( m_receiveBuffer, dataBuffer, dataBufferLength );

            if( ReceiveData != null ) {
                ReceiveData( dataBuffer );
            }

            thisSocket.BeginReceive( m_receiveBuffer, 0, m_receiveBuffer.Length, SocketFlags.None,
                     new AsyncCallback( receiveDataBytes ), thisSocket );

        }
    }  
</code>

<code>
    public partial class Form1 : Form {

        private Socket localSocket = new Socket( AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp );

        public Form1() {

            InitializeComponent();

            Socket newConnection = localSocket.Accept();

            TcpConnection myConnection = new TcpConnection( newConnection );
            myConnection.ReceiveData += new TcpConnection.ReceiveDataEventHandler( receiveDataEvent );

            myConnection.startReceiving();
        }
        
        private void receiveDataEvent( byte[] data ) {

            this.Text = System.Text.Encoding.ASCII.GetString( data ); // HERE I GOT THE INVALIDOPERATIONEXCEPTION
        }
    }
</code>

<br />
string _filePath = "C:\\newFolder";<br />
Process myProcess = new Process();<br />
myProcess.StartInfo.FileName = _filePath + "\\test.HTML";<br />
myProcess.StartInfo.Verb = "Print";<br />
myProcess.StartInfo.CreateNoWindow = true;<br />
myProcess.Start();