WebClient Unity

System.Net.ServicePointManager.Expect100Continue = false;
using (WebClient wc = new WebClient())
{
    wc.Headers[HttpRequestHeader.ContentType] = "application/x-www-form-urlencoded";
    wc.UploadFileCompleted += new UploadFileCompletedEventHandler (UploadFileCallback);
    wc.UploadFileAsync(new System.Uri(path), "POST", filePath);
}
private void UploadFileCallback(System.Object sender, UploadFileCompletedEventArgs e)
{
    if (e.Error != null)
         print("error");
    else
        print("success");
}