public void DownloadFileAsync(Uri uri, string customSavePath = null)
{
this.Filename = customSavePath ?? Filename;
this.ProgressPercentage = 0;
Wrapped.DownloadProgressChanged += (s, e) => OnDownloadProgressChanged(e);
Wrapped.DownloadFileCompleted += (s, e) => OnDownloadFileCompleted(e);
Wrapped.DownloadFileAsync(uri, this.Filename);
Status = RangeWebClientStatus.Running;
}