e.Cancel does not work
===

I have VS 2010 and want to cancel the form closing event via a Yes|No|Cancel dialog, but when I put the e.Cancel in the event handler for the dialog box, I get an error that says "'System.EventArgs' does not contain a definition for 'Cancel' and no extension method 'Cancel' accepting a first argument of type 'System.EventArgs' could be found (are you missing a using directive or an assembly reference?)." Also the word "Cancel" has a red line under it. Everything I've read online says this is the only way to cancel a FormClosing event. I tested the code in VS2008 and it does the same thing.

The code for the event handler is below:

    private void displayMessageBox(object sender, EventArgs e)
            {
            DialogResult result = MessageBox.Show("Do you want to save the changes to the document before closing it?", "MyNotepad",MessageBoxButtons.YesNoCancel, MessageBoxIcon.Warning);
            if (result == DialogResult.Yes)
            {
                saveToolStripMenuItem_Click(sender, e);
            }
            else if (result == DialogResult.No)
            {
                rtbMain.Clear();
                this.Text = "Untitled - MyNotepad"; 
            }
            else if (result == DialogResult.Cancel)
            {
                // Leave the window open.
                e.Cancel() = true;


            }

Here are the usings (in the event it makes a difference):

    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;
    using System.IO;