public static PolygonMarkerPage GetInstance()
{
lock (_lock)
{
if (instance == null)
{
instance = new PolygonMarkerPage();
}
return(instance);
}
}
protected override void OnDisappearing()
{
instance = null;
base.OnDisappearing();
}
protected override bool OnBackButtonPressed()
{
instance = null;
return(base.OnBackButtonPressed());
}