public override bool OnOptionsItemSelected(IMenuItem item)
{
    if (item.ItemId != global::Android.Resource.Id.Home) return base.OnOptionsItemSelected(item);

    ViewModel.BackNavigationButtonCommand.Execute();
    return true;
}

SupportActionBar.SetHomeButtonEnabled(true);
SupportActionBar.SetDisplayHomeAsUpEnabled(true);

[Activity(
    Label = "Project Wavelength"
    , Icon = "@drawable/icon"
    , Theme = "@style/Theme.AppCompat.Light.DarkActionBar"
    , ScreenOrientation = ScreenOrientation.Portrait
    , LaunchMode = LaunchMode.SingleTop)]

[Activity(Label = "DevicesWithSensorsForRoom"
    , Icon = "@drawable/icon"
    , ScreenOrientation = ScreenOrientation.Portrait
    , Theme = "@style/Theme.AppCompat.Light.DarkActionBar"
    , ParentActivity = typeof(RoomsOverviewActivity)
    , LaunchMode = LaunchMode.SingleTop)]