Question

I have a problem with my confirmation messages..
I have two MessageBox, the first one ask “Do you want to quit?”
The second one, ask “Are you sure!?”
My problem is that if I choose yes when the first MessageBox “Do you want to quit?” show up, the second MessageBox will still appear..

namespace WindowsFormsApplication5
{
    public partial class Form1 : Form
    {

        private void Form1_FormClosing(Object sender, FormClosingEventArgs e)
        {
            var confirmationBox = MessageBox.Show(@"Do you want to quit", @"Title",
                                                  MessageBoxButtons.YesNo);
            var confirmationBox2 = MessageBox.Show(@"Are you sure?", @"", MessageBoxButtons.YesNo);


            if (confirmationBox == DialogResult.Yes)
            {
                if (confirmationBox2 == DialogResult.No)
                {
                    e.Cancel = true;
                }
            }

        }

    }
}

Answer 1

Don’t show the second message box until you have inspected the results of the first:

var confirmationBox = MessageBox.Show(@"Do you want to quit", @"Title",
    MessageBoxButtons.YesNo);

if (confirmationBox == DialogResult.Yes)
{
    var confirmationBox2 = MessageBox.Show(@"Are you sure?", @"", MessageBoxButtons.YesNo);
    if (confirmationBox2 == DialogResult.No)
    {
        e.Cancel = true;
    }
}

P.S. annoying your users with dialogs such as these are annoying; consider not doing this unless there’s a real compelling reason that they shouldn’t close right now (i.e. in the middle of an operation that would be left in an invalid state, or have unsaved data).