Dial mobile phone via C# program

Question

I m trying to Dial mobile phone via C# program. Below Show my Program. In this, When i Click my Dial Button it dial the number(Destination number) which i given in my progra

Answer 1

Here is my working dialing cord it rings the phone Don't knows that how to get the voice input and out put from port I'm using huwavi E173 dongle.Here is my working cord C#

SerialPort port = new SerialPort();
port.Open();
string t = port.ReadExisting();
Thread.Sleep(100);

string cmd = "ATD";
Thread.Sleep(100);
string phoneNumber = "071********";
Thread.Sleep(100);
port.WriteLine(cmd + phoneNumber + ";\r");

port.Close();