：C#如何实现把word文档内的图片提取出来

int i = 0; foreach (Word.InlineShape ish in doc.InlineShapes) {      if (ish.Type == Word.WdInlineShapeType.wdInlineShapePicture)      {           ish.Select();           newApp.Selection.Copy();           Image image = Clipboard.GetImage();           Bitmap bitmap = new Bitmap(image);           bitmap.Save("c:\\pic" + i.ToString() + ".jpg");           i++;      } }