private void on_copyKeyButton_clicked(object o, EventArgs args)
{
string publicKey = new PublicKey(nicknameEntry.Text, provider.ToXmlString(false)).ToArmoredString();
Gtk.Clipboard.GetForDisplay(Gdk.Display.Default, Gdk.Atom.Intern("CLIPBOARD", true)).Text = publicKey;
Gui.ShowMessageDialog("The clipboard has been set.", dialog);
}