How to call a write and read function from the main

Hi all!i need help...i have a write function and read function to write and read through RS-232 to another pc.This source code i put it inside a class.I have a main and want to call this function out.How am i going to call this function.Thanks!

/*-- For receiving of data from other parties --*/

public byte[] Read(int NumBytes)

byte[] BufBytes; //------Declaring of dynamic Array

byte[] OutBytes; //------Declaring of dynamic Array

BufBytes = new byte[NumBytes]; //------Setting the Array Size to NumBytes( From parameter )

/*-- Check Port is Open --*/

if( hComm != INVALID_HANDLE_VALUE )

OVERLAPPED ovlCommPort = new OVERLAPPED(); //------Declaring of ovlCommport

int BytesRead = 0; //------Declaring of BytesRead and set to 0

ReadFile(hComm,BufBytes,NumBytes,ref BytesRead,ref ovlCommPort); //------Get data from RS232

OutBytes = new byte[BytesRead]; //------Setting the size of Array to BytesRead

Array.Copy(BufBytes,OutBytes,BytesRead); //------Copy previous array data to new array data for preventing data loss

return OutBytes; //------Return the GET data

}/*-- End of Check Port is Open --*/

return null; //------Return null( nothing )

}/*-- End of Function Read --*/

 

/*-- Function Write --*/

/*-- For transfering of data from other parties --*/

public void Write(byte[] WriteBytes)

/*-- Check Port is Open --*/

if( hComm != INVALID_HANDLE_VALUE )

OVERLAPPED ovlCommPort = new OVERLAPPED(); //------Declaring of ovlCommport

int BytesWritten = 0; //------Declaring of BytesWritten and set to 0

WriteFile(hComm,WriteBytes,WriteBytes.Length,ref BytesWritten,ref ovlCommPort); //------Transfer data to RS232

}/*-- End of Check Port is Open --*/

}/*-- End of Function Write --*/