Method to center around overlay items

gistfile1.cs

private void CenterAroundOverlayItems()
{
	if (itemizedOverlay.OverlayItems.Count == 0) return;

	double hpadding = 0.1;
	double vpadding = 0.15;

	//start wide
	int minLatitude = (int)(90 * 1E6);
	int maxLatitude = (int)(-90 * 1E6);
	int minLongitude = (int)(180 * 1E6);
	int maxLongitude = (int)(-180 * 1E6);

	foreach (OverlayItem item in itemizedOverlay.OverlayItems.ToArray())
	{
		int lat = item.Point.LatitudeE6;
		int lon = item.Point.LongitudeE6;
		//narrow down
		maxLatitude = Math.Max(lat, maxLatitude);
		minLatitude = Math.Min(lat, minLatitude);
		maxLongitude = Math.Max(lon, maxLongitude);
		minLongitude = Math.Min(lon, minLongitude);
	}

	maxLatitude = maxLatitude + (int)((maxLatitude - minLatitude) * hpadding);
	minLatitude = minLatitude - (int)((maxLatitude - minLatitude) * hpadding);

	maxLongitude = maxLongitude + (int)((maxLongitude - minLongitude) * vpadding);
	minLongitude = minLongitude - (int)((maxLongitude - minLongitude) * vpadding);

	mapView.Controller.ZoomToSpan(maxLatitude - minLatitude, maxLongitude - minLongitude); //this will zoom to nearest zoom level
	mapView.Controller.AnimateTo( //go to the center of the span
		new GeoPoint(
			(int)((maxLatitude + minLatitude) / 2),
			(int)((maxLongitude + minLongitude) / 2)
			));

}

The ToArray() call is because it creates a copy of the itemized overlay object which allows to read and write to it at the same time.