I have a problem passing back data from a serial class to the main form

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C#

I am trying to pass data back from a serial port class to the Main Form. I have tried to use example code from other questions on this topic(eg c# - Accessing WinForms Controls from a serial port in a class - Stack Overflow[^] ) . I have tried to follow the example code as closely as possible and made a very simple project to get it working before expanding the project. When I compile I get errors.
The Serial class is a .cs file in the same project as the Main Form .cs file.

Main Form code:

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;

namespace SendReceiveData
{
    public partial class Form1 : Form
    {
        SerialClass myComms;

        public Form1()
        {
            InitializeComponent();
        }
        private void Form1_Load(object sender, EventArgs e)
        {
            myComms = new SerialClass();
            myComms.DataReceived += new myComms.DataReceivedDelegate(myCommsDataReceived);    // ERROR 1 at compile          
            // Open COMM3 at 19200 baud
            myComms.OpenSerialPort(3, 19200);               
        }
 
        private void button1_Click(object sender, EventArgs e)
        {
            myComms.commsPortWriteMsg("Hello");
        }

        private delegate void DataReceivedDelegate(string data);

        void myCommsDataReceived(string data)
        {
            if (this.InvokeRequired)
            {
                this.Invoke(new DataReceivedDelegate(myCommsDataReceived), new Object[] { data });
            }
            else
            {
                textBox1.Text = data;
            }
        }

    }
}

The Serial class

<pre>using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.IO.Ports;

namespace SendReceiveData
{
    class SerialClass
    {
        public delegate void DataReceivedDelegate(string data);
        public event DataReceivedDelegate DataReceived;

        static SerialPort commsPort;

        public SerialClass()
        {
            commsPort = new SerialPort();
            // Attach a method to be called when data waiting in the port's buffer
            commsPort.DataReceived += new SerialDataReceivedEventHandler(commsPortDataReceived);
        }

        public Boolean OpenSerialPort(byte comPort, int baudRate)
        {
            Boolean boolResult;
            try
            {
                // Initialise COM port
                commsPort.PortName = "COM" + comPort.ToString();
                commsPort.Parity = Parity.None;
                commsPort.DataBits = 8;
                commsPort.StopBits = StopBits.One;
                commsPort.ReadTimeout = 500;
                commsPort.WriteTimeout = 500;
                commsPort.BaudRate = baudRate;

                if (!commsPort.IsOpen)
                {
                    commsPort.Open();
                }
                boolResult = true;
            }
            catch (Exception ex)
            {
                boolResult = false;
                SerialPortClose();
            }
            return boolResult;
        }

        private static void commsPortDataReceived(object sender, SerialDataReceivedEventArgs e)
        {
            // ... grab the data and place into a string called "data" ...
            string data = "";

            // raise our custom event:
            if (DataReceived != null)    <// ERROR 2 AT COMPILE
            {
                DataReceived(data);      // ERROR 3 AT COMPILE
            }
        }

        public Boolean commsPortWriteMsg(byte[] bOutbuffer)
        {
            Boolean boolResult = false;
            try
            {
                // Write data
                int msgLen = (int)(bOutbuffer[4]) * 256;
                msgLen += (int)bOutbuffer[5];

                commsPort.Write(bOutbuffer, 0, msgLen + 7);
            }
            catch (Exception ex)
            {
                boolResult = false;
            }
        }

        ....
        // Other functions 
    }
}

What I have tried:

When I compile the code I get errors. I have shown the lines where the errors occur as bold and underlined :

Error1 Form1.cs 23 'SendReceiveData.Form1.myComms' is a 'field' but is used like a 'type'

Error3 SerialClass.cs 61 An object reference is required for the non-static field, method, or property 'SendReceiveData.SerialClass.DataReceived'

Error4 SerialClass.cs 63 An object reference is required for the non-static field, method, or property 'SendReceiveData.SerialClass.DataReceived'

Help solving this would be appreciated!