void grd_content_Tap(object sender, System.Windows.Input.GestureEventArgs e)
{
if (Mymap.Layers.Contains(mypositionPoi))
{
Mymap.Layers.Remove(mypositionPoi);
mypositionPoi.Clear();
}
if (Mymap.Layers.Contains(detailPois))
{
Mymap.Layers.Remove(detailPois);
detailPois.Clear();
}
}
#endregion