GsmComm.GsmCommunication.GsmCo...

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C#

C#4.0

Hi I am using Window 8 and I used GSMCommunication lib to send message from my computer. But I found the error "Port can not be open"
Please, check my code

private GsmCommMain _comm;
        public GsmCommMain comm
        {
            get { return _comm; }
            set { _comm = value; }
        }

public SMSCommon()
       {         
           comm = new GsmCommMain();
       }

public bool SendSMS(string message, int charset, string phone, SmsSubmitPdu pdu)
        {

comm.Open();
comm.SendMessage(pdu);