Word doc to RichTextbox along with shapes and images

One way is that read the contents from Word document as you are reading and set that data into ClipBoard (using ClipBoard.SetData(), ClipBoard.SetText(), ClipBoard.SetImage() etc. methods )

Then paste them into RichTextBox control as following way:

            if (Clipboard.ContainsText())
            {
                string s = Clipboard.GetText();
                richTextBox1.Paste();
            }

            if (Clipboard.ContainsImage())
            {
                Image s = Clipboard.GetImage();
                richTextBox1.Paste();
            }