private void TextBoxKeyShortcut_KeyDown(object sender, KeyEventArgs e)
{
if (e.Key >= Key.A && e.Key <= Key.Z ||
AcceptKeys.Contains(e.Key))
{
if (HasKeyDuplicate(e.Key) == false)
{
KeysList.Add(e.Key);
if (!string.IsNullOrEmpty(TextBoxKeyShortcut.Text))
{
TextBoxKeyShortcut.Text += " + ";
}
TextBoxKeyShortcut.Text += e.Key.ToString();
}
}
e.Handled = true;
}