How to insert a picture into Excel file and save the file with the picture in C#?

I created an Excel file using C# and I need to insert a picture in it and save the file with the picture.

I used the following code to insert a picture into a cell, and it worked - the picture was inserted into the opened file
                        oXL = new Excel.Application();
                        //Get a new workbook.
                        oWB = (Excel._Workbook)(oXL.Workbooks.Add( Missing.Value ));
                        oSheetP = (Excel._Worksheet)oWB.Worksheets[1];
                        oXL.Visible = true;

                                                                //populate the file below
                                                                // ....................some code
                                                               
                                                                // insert a picture
                        string thelogo = currentDir + "\\images\\logo.gif";
                        System.Drawing.Image oImage = System.Drawing.Image.FromFile(thelogo);
                        Excel.Range imgRange;

                        imgRange = (Excel.Range)oSheetP.Cells[1, 12];
                        System.Windows.Forms.Clipboard.SetDataObject(oImage, true);
                        oSheetP.Paste(imgRange, thelogo);

But then I used the following code to save the file, and the picture was not saved.  (In the process of file saving, I was notified by the prompt box that the picture will be lost, and it was lost.)
                  oWB.SaveAs(MyFileName, Excel.XlFileFormat.xlXMLSpreadsheet,
                                    System.Reflection.Missing.Value, System.Reflection.Missing.Value,
                                    System.Reflection.Missing.Value, System.Reflection.Missing.Value,
                                    Excel.XlSaveAsAccessMode.xlNoChange,
                                    System.Reflection.Missing.Value, System.Reflection.Missing.Value,
                                    System.Reflection.Missing.Value, System.Reflection.Missing.Value,
                                    System.Reflection.Missing.Value);

How can I save the file to preserve a picture in it?
Do I need to use another code to insert a picture or another code to save the file?

Please not that when I just tried to save the opened file by clicking on File/Save As on the Excel menu, the file was saved, and the picture was saved as well.  So the picture can be saved.  But I need to save the file using C# code, and it is just that this Workbook.SaveAs( ) method does not do the work.

Please suggest a solution