You were right I needed to update my .net sdks. It's working great now!

So I'm having an issue with VS 2010 trying to use the serial port of the Netduino to display to a matrix orbital lcd display. Intellisense isn't showing any errors in my code but when I go to deploy it to the board it has the following error at the bottom of the page:

Error 1 0x80131700 C:\Documents and Settings\Administrator\my documents\visual studio 2010\Projects\NetduinoApplication1\NetduinoApplication1\MMP NetduinoApplication1

I'm a total newb to C# and visual studio so maybe I'm doing something stupid but I don't know what the issue is. My code is:

using System;
using System.IO.Ports;
using System.Text;                              // UTF Encoding
using System.Threading;
using Microsoft.SPOT;
using Microsoft.SPOT.Hardware;
using SecretLabs.NETMF.Hardware;
using SecretLabs.NETMF.Hardware.Netduino;

namespace NetduinoApplication1
{
    public class Program
    {
        static OutputPort led = new OutputPort(Pins.ONBOARD_LED, false);

        //instantiate the serial port connection                           
        static SerialPort MyserialPort = new SerialPort("COM1",19200);

        public static void Main()
        {
            MyserialPort.Open();

            if (MyserialPort.IsOpen)
            {
                Debug.Print("Serial Port is open.");
            }

            InterruptPort button = new InterruptPort(Pins.ONBOARD_SW1, false, Port.ResistorMode.Disabled, Port.InterruptMode.InterruptEdgeBoth);
            button.OnInterrupt += new NativeEventHandler(button_OnInterrupt);

            Thread.Sleep(Timeout.Infinite);
        }

        static void button_OnInterrupt(uint data1, uint data2, DateTime time)
        {
            // Set the led
            led.Write(data2 == 0);

            // Encode to UTF8
            UTF8Encoding enc = new UTF8Encoding();
            // Encode Byte array
            string tempString = "Button Press";
            byte[] tempData = enc.GetBytes(tempString);
            // Write to Serial Port
            int bytesWritten = MyserialPort.Write(tempData, 0, tempData.Length);

            Debug.Print("Bytes Written" + bytesWritten.ToString());
        }
    }
}

I did look at the document on adding the reference to Microsoft.SPOT.Hardware.SerialPort and I think I did it correctly. Do I need to add a Using statement for Microsoft.SPOT.Hardware.SerialPort as well? I tried it and it didn't like it so I left it out

Oh and I boosted the code from someone else on here so if it was you don't get mad

Thanks

So the specs say the following: digital pins 2, 3, 7: 16 mA per pin analog pins 0-3: 2 mA per pin microcontroller max current: 200 mA total however does this include the power output pins for 5v and 3.3v on J6 pins 2 and 3? are they part of the microcontroller or a separate system and if so what's the max current they can output? I just want to be sure before I try and draw too much current through them. Thanks! ..and I stuck this in the wrong forum my bad