SerialPort not found? Anyone see why? I have added System.IO as a reference but no luck! Using G120
using System;
using Microsoft.SPOT;
using GHI.Premium.IO;
using mfnet.smallbiz.common;
using Microsoft.SPOT.IO;
using System.Threading;
using System.Collections;
using GHI.Premium.Hardware;
using Microsoft.SPOT.Hardware;
using GHI.Hardware.G120;
using System.Text;
using System.IO;
SerialPort xbee = new SerialPort("COM3", 115200, Parity.None, 8, StopBits.One);