Add AccessKeys to standard NavigationView elements

NavigationViewHelper.cs

using Microsoft.UI.Xaml.Controls;
using Microsoft.UI.Xaml.Input;

namespace InTheHand.UI.Xaml.Controls
{
    public static class NavigationViewHelper
    {
        /// <summary>
        /// Add standard access keys to the NavigationView control.
        /// </summary>
        /// <remarks>These are based on Microsoft Your Phone, there isn't a standard implementation across all NavigationView based apps.</remarks>
        /// <param name="navigationView"></param>
        public static void SetAccessKeys(this NavigationView navigationView)
        {
            // access key to show/hide navigation pane
            navigationView.AccessKey = "H";
            navigationView.KeyTipPlacementMode = KeyTipPlacementMode.Right;

            // access key to open Settings item
            var settingsItem = navigationView.SettingsItem as NavigationViewItem;
            settingsItem.AccessKey = "S";
            settingsItem.KeyTipPlacementMode = KeyTipPlacementMode.Right;
        }
    }
}