Inheritance: System.EventArgs
 private void UpdateProgressEvent(object sender, ProgressEventArgs e)
 {
     UpdateProgress(e.Percent);
 }
 protected virtual void OnUpdateProgress(ProgressEventArgs e)
 {
     var del = UpdateProgress;
     if (del != null)
     {
         del(this, e);
     }
 }
 private void UpdateProgressEvent(object sender, ProgressEventArgs e)
 {
     UpdateProgress(e.Percent);
 }