Create Interface

for create Interface use keyword interface then name of the interface here is an example.

interface IEmployee
    {
         string FirstName{get;set;}
         string EmpID{get;set;}
         int Age{get;set;}
         DateTime DateOfJoining { get; set; }
         bool Save();
    }

Create a class

for create a class use the keyword class then name of the class here is an example.

class Employee
    {
        public string FirstName
        {
            get;
            set;
        }
        public string EmpID
        {
            get;
            set;
        }
        public int Age
        {
            get;
            set;
        }
        public bool Save()
        {
            return true;
        }
        public DateTime DateOfJoining
        {
            get;
            set;
        }

Socket Programming

private void btnRead_Click(object sender, EventArgs e)

        {

           string Query = "POST /test/service.asmx/HelloWorld HTTP/1.1\r\n" +

            "Host: 192.168.1.25\r\n" +

            "Content-Type: application/x-www-form-urlencoded\r\n" +

           "Content-Length:0 \r\n";

            byte[] byArrsend = System.Text.ASCIIEncoding.ASCII.GetBytes(Query);

            try

            {

                IPAddress ipAddress = IPAddress.Parse("110.234.132.130");

                IPEndPoint ipEnd = new IPEndPoint(ipAddress, 80);

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

                socket.Connect(ipEnd);

                if (socket.Connected)

                {

                    socket.Send(byArrsend);

                    socket.BeginReceive(buffer, 0, buffer.Length, SocketFlags.None, new AsyncCallback(OnReceive), socket);

                    //MessageBox.Show(responceBuilder.ToString());

                    while (reading)

                        System.Threading.Thread.Sleep(200);

                    textBox1.Text = Responce;

                    StreamWriter sw = new StreamWriter("\\My Documents\\Socket1.xml");

                    sw.Write(Convert.ToString(responceBuilder));

                }

                else

                {

                    MessageBox.Show("Not Connected");

                }

            }

            catch (Exception ex)

            {

                MessageBox.Show(ex.ToString());

            }

        }

        int bytesRead;

        string Responce;

        bool reading = true;

        byte[] buffer = new byte[1024];

        StringBuilder responceBuilder = new StringBuilder();

        private void OnReceive(IAsyncResult ar)

        {

            try

            {

                //while (reading == true)

                //{

                    Socket socket = (Socket)ar.AsyncState;

                    bytesRead = socket.EndReceive(ar);

                    if (bytesRead > 0)

                    {

                        Responce = Encoding.ASCII.GetString(buffer, 0, bytesRead);

                        //_Receive = true;

                    }

                    if (bytesRead > 0)

                    {

                        if (responceBuilder.Length == 0)

                        {

                            string tempString = Encoding.ASCII.GetString(buffer, 0, bytesRead);

                            //if (replace) ;

                            //{

                                 // tempString = tempString.Remove(0, tempString.IndexOf("<?xml version="));

                            //}

                            responceBuilder.Append(tempString);

                        }

                        else

                        {

                            responceBuilder.Append(Encoding.ASCII.GetString(buffer, 0, bytesRead));

                        }

                        socket.BeginReceive(buffer, 0, buffer.Length, SocketFlags.None, new AsyncCallback(OnReceive), socket);

                        reading = true;

                    }

                    else

                    {

                        reading = false;

                    }

                //}

                Responce = responceBuilder.ToString();

            }

            catch (Exception ex)

            {

                MessageBox.Show(ex.ToString());

            }

            //responceBuilder = responceBuilder.Remove(0, 0);

            //StreamWriter sw=new StreamWriter("\\My Documents\\Socket1.xml");

            //sw.Write(Convert.ToString(responceBuilder));

        }