the equivalent of invoke in mvc

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C#

ASP.NET

MVC

hi
i read serial port in windows form with this code :

serialPort1.Open();
                serialPort1.DataReceived += new SerialDataReceivedEventHandler(serialPort1_DataReceived);
private void DisplayText(object sender, EventArgs e)
        {
            enterCardNo_txtBox.AppendText(DispString.ToString());
        }
        private void serialPort1_DataReceived(object sender, System.IO.Ports.SerialDataReceivedEventArgs e)
        {
            DispString = serialPort1.ReadExisting();

            Invoke(new EventHandler(DisplayText));
        }

NOW
i want to read serial port in ASP.Net Mvc2

but "Invoke" method is Unknown mvc2

What is the equivalent of invoke in mvc ???