private void CopyButton_Click(object sender, RoutedEventArgs e)
        {
            if (HexEdit.CanCopy())
            {
                HexEdit.CopyToClipboard();

                try
                {
                    if (Clipboard.ContainsText())
                    {
                        MessageBox.Show(Clipboard.GetText());
                    }
                }
                catch
                {
                    //Clipboard fail
                    if (Clipboard.ContainsText())
                    {
                        MessageBox.Show(Clipboard.GetText());
                    }
                }
            }
            else
            {
                MessageBox.Show("Can't copy right now !");
            }
        }