public void DownloadFile(string url)
        {
            System.Net.WebClient wInstance = new System.Net.WebClient();
            string tempPath = System.IO.Path.GetTempPath();
            string fileName = url.Split('/')[ url.Split('/').Length-1];
            string savePath = tempPath + fileName;

            wInstance.DownloadFile(url, savePath);
            
        }