How can you have keyboard shortcuts on the NotifyIconWPF ContextMenu (e.g. press O after right-click, instead of clicking exit)?

Hi,

I have created NotifyIcon (SystemTrayIcon) for wpf using Windows Form NotifyIcon component.

I have made many failed attempts to use keyboard shortcuts on the context menu of NotifyIcon WPF.

<MenuItem x:Uid="MenuItem_2" Header="_Open IDC" Command="{Binding ShowWindowCommand}"></MenuItem>

This does not work. The O shows up underlined, but pressing the key does nothing.

Thanks in advance.