private void button5_Click(object sender, EventArgs e)
{
if (gMapControl.Zoom > 10)
gMapControl.Position = new PointLatLng(gMapControl.Position.Lat + 0.1, gMapControl.Position.Lng);
else if (gMapControl.Zoom > 8)
gMapControl.Position = new PointLatLng(gMapControl.Position.Lat + 0.2, gMapControl.Position.Lng);
else
gMapControl.Position = new PointLatLng(gMapControl.Position.Lat + 0.5, gMapControl.Position.Lng);
UpdatelblCenter();
}