private void downloader_DownloadProgressChanged(object sender, DownloadProgressEventArgs e)
{
Invoke(new ParamMethodInvoker(UpdateProgress), new object[] { e.BytesRead, e.TotalBytes, e.Message });
}
/// <summary>
/// Fires the DownloadProgressChanged event
/// </summary>
/// <param name="e"></param>
protected virtual void OnProgressChanged(DownloadProgressEventArgs e)
{
if (DownloadProgressChanged != null)
DownloadProgressChanged(this, e);
}