public class MapDeviceLocationOptions 

{
    //Gets the current device location options used by the MapDeviceLocationService
    var options = MapDeviceLocationService.Instance.GetDeviceLocationOptions();
    //Device location visibility on the map
    var visibility = options.DeviceLocationVisibility;
    //MappingDeviceLocationNavigationMode
    var navMode = options.NavigationMode;
    //Heading of the location from the device points to the top of the screen
    var trackUp = options.TrackUpNavigation;
    //Show accuracy buffer on the map
    var showBuffer = options.ShowAccuracyBuffer;
}

{
    // Get the MapDeviceLocationOptions currently used by the MapDeviceLocationService

    var currentOptions = MapDeviceLocationService.Instance.GetDeviceLocationOptions();
    if (currentOptions == null)
        return;
    // Set the device location visibility on the map to true
    currentOptions.DeviceLocationVisibility = true;
    //Set the navigation mode to keep the device location at the center of the map
    currentOptions.NavigationMode = MappingDeviceLocationNavigationMode.KeepAtCenter;
    //Note: Run within a QueuedTask
    //Sets the MapDeviceLocationOptions to be updates with these values
    MapDeviceLocationService.Instance.SetDeviceLocationOptions(currentOptions);
}