How to open word file in rich text box with images and bullets

I want to open a word file in rich text box .
i am using this code-

 Microsoft.Office.Interop.Word.ApplicationClass wordObject = new Microsoft.Office.Interop.Word.ApplicationClass();
                object File = txtfilepath.Text; //this is the path
                // for open a word file in word document use this code 
               // Process.Start(File);
                object nullobject = System.Reflection.Missing.Value;
                Microsoft.Office.Interop.Word.Application wordobject = new Microsoft.Office.Interop.Word.Application();
                wordobject.DisplayAlerts = Microsoft.Office.Interop.Word.WdAlertLevel.wdAlertsNone;
                Microsoft.Office.Interop.Word._Document docs = wordObject.Documents.Open(ref File, ref nullobject, ref nullobject, ref nullobject,
                ref nullobject, ref nullobject, ref nullobject, ref nullobject,
                ref nullobject, ref nullobject, ref nullobject, ref nullobject,
                ref nullobject, ref nullobject, ref nullobject, ref nullobject);
                docs.ActiveWindow.Selection.WholeStory();
                docs.ActiveWindow.Selection.Copy();
                IDataObject data = Clipboard.GetDataObject();
                rtbgermanfile.Text = data.GetData(DataFormats.Text).ToString();
docs.Close(ref nullobject, ref nullobject, ref nullobject);
                wordobject.Quit(ref nullobject, ref nullobject, ref nullobject);
                //wordobject.Quit(SaveChanges:false, OriginalFormat: false, RouteDocument: false);
                System.Runtime.InteropServices.Marshal.ReleaseComObject(wordobject);

It works fine but open only text. i want to open images and bullets also .

Thanks in Advance