private void btnHigh_Click(object sender, EventArgs e)
{
ZoomLevelSet zoomLevelSet = new ZoomLevelSet();
winformsMap1.CurrentExtent = ExtentHelper.ZoomToScale(zoomLevelSet.ZoomLevel03.Scale, winformsMap1.CurrentExtent, GeographyUnit.DecimalDegree, winformsMap1.Width, winformsMap1.Height);
winformsMap1.Refresh();
}