如何向richtext格式的文件或文件流中添加图片

private   void   button2_Click(object   sender,   System.EventArgs   e)  
  {  
   
  openFileDialog1.Filter   =   "图片文件|*.jpg|所有文件|*.*";  
  if(openFileDialog1.ShowDialog()   ==   DialogResult.OK)  
  {  
  Clipboard.SetDataObject(Image.FromFile(openFileDialog1.FileName),false);  
  richTextBox1.Paste();  
  }  
   
  }