richtextbox.copy()不能将图片拷贝到剪切板

将代码改为如下形式：

Image img = Properties.Resources.图片;
Clipboard.SetDataObject(img);
DataFormats.Format dataFormat = DataFormats.GetFormat(DataFormats.Bitmap);
richTextBox1.Select(0, 1);
if ((this.richTextBox1.SelectionType & RichTextBoxSelectionTypes.Object) ==         
     RichTextBoxSelectionTypes.Object)
{
    richTextBox1.Copy();
}