How to get the selected value of listbox using C# code

The following code retrieves the value of listbox and the accompanying text

private void listBox1_SelectedValueChanged(object sender, EventArgs e)
        {
            MessageBox.Show(listBox1.Text);
            MessageBox.Show(listBox1.SelectedValue.ToString());
        }

The above method retrieves the displaytext (DisplayMember) and the selected value (DisplayValue) from the selected item of listbox