How Do I Popup A Message Box On Form Close Event

See more:

C#

i have a richtext box

i want to ask the user to save that data in richtext box on form closing event.

protected override void OnFormClosing(FormClosingEventArgs e) 
{
        base.OnFormClosing(e);
        if (!e.Cancel) {
            if (MessageBox.Show("Really?", "Close", MessageBoxButtons.YesNo) != DialogResult.Yes) 

            {
                e.Cancel = true;
            }
        }
    }

above is the code for asking user on closing event.

My code for saving richtextbox data in txt file is

<pre lang="cs">public void SaveMyFile()
        {
            //// Create a SaveFileDialog to request a path and file name to save to.
            SaveFileDialog saveFile1 = new SaveFileDialog();

            //// Initialize the SaveFileDialog to specify the RTF extension for the file.
            saveFile1.DefaultExt = "*.txt";
            saveFile1.Filter = "Chat History (*.txt)|*.txt";

            //// Determine if the user selected a file name from the saveFileDialog.
            if (saveFile1.ShowDialog() == System.Windows.Forms.DialogResult.OK &&
               saveFile1.FileName.Length > 0)
            {
                //// Save the contents of the RichTextBox into the file.
                richTextBox1.SaveFile(saveFile1.FileName, RichTextBoxStreamType.PlainText);
            }
        }

if user says yes then save file and exit

if user says no then exit without saving.