Hotkey on user control WPF c#

Question

my project it:

- one windows (Access.xaml)

- other page is redirect (User Control) Internal (my windows).

_toolbarcontent.Visibility = Visibility.Visible;
content.Content = new Pages.xcompany();

Then I Used Quick Lunch On Main page(user control: Welcome.xaml).

I want to use hot key For example (F1 Key: receipt voucher Page, F2 Key.. etc)

I tried Sample Code:

- (NHotKey But I can't Adjustment and this library not content More option like (define global, local.., check if exist already hotkey, exception, ...etc).

private void _addHotKeys() {
HotkeyManager.Current.AddOrReplace("Pay", Key.F1, ModifierKeys.None, PayHotKey);
HotkeyManager.Current.AddOrReplace("sel", Key.F2, ModifierKeys.None, SelHotKey);
}

private void PayHotKey(object sender, EventArgs e)
{
 Properties.Settings.Default.ParaMID = "35";
 Properties.Settings.Default.Save();
 _libcode.HideForm();
}

private void SelHotKey(object sender, EventArgs e)
{
 Properties.Settings.Default.ParaMID = "45";
 Properties.Settings.Default.Save();
 _libcode.HideForm();
}

this code is successful but appeared in exception error code (Already Register Hot key like

HotkeyManager.Current.AddOrReplace("Exit", Key.Escape, ModifierKeys.None, ExitHotKey);

- KeyDown, PreviewKeyDown ON User Control OR Main Grid, but not fired on Escape Key to hide user control appeared.

x:Class="_main.lDialog" x:Name="root" xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" PreviewKeyDown="root_KeyDown">

My Code:

private void root_KeyDown(object sender, KeyEventArgs e)
{ if (e.Key == Key.Escape)
     {
     _resultDiag = false;
     HideHandlerDialog();
     }
}

Please Help Me, I want To Library OF Hot Key Management With Option and Most controlled like check if register and controlled if exist.. etc AND Applied ON (USER CONTROL) WPF with C# NOT ON Windows WPF C#.