protected void Download(byte[] zipBytes)
{
System.Web.HttpResponse response = System.Web.HttpContext.Current.Response;
string fileName = "tracciati.zip";
response.ContentType = "binary/octet-stream";
response.AddHeader("Content-Type", "binary/octet-stream");
response.AddHeader("Content-Disposition", "attachment;filename=" + fileName + "; size=" + zipBytes.Length);
response.Flush();
response.BinaryWrite(zipBytes);
response.Flush();
response.End();
}