C#中的拷贝与粘贴

  private void btnCopy_Click(object sender, System.EventArgs e)
  {
   string text = this.txtContent.SelectedText;
   Clipboard.SetDataObject(text);
  }

  private void btnPaste_Click(object sender, System.EventArgs e)
  {
   IDataObject data = Clipboard.GetDataObject();
   if (data.GetDataPresent(DataFormats.Text))
   {
    this.txtPaste.Text = data.GetData(DataFormats.Text).ToString();
   }
 }