How to add Header in Word File using DocX Library in C#

I am using DocX Reference and there is problem in generating image in the header .. how to add Image Header??

// Create the document in memory:
                        var doc = DocX.Create(fileName);
                        using (MemoryStream ms = new MemoryStream())
                        {
                            //if(Branch=="SFA"|Branch=="SSA")
                            //System.Drawing.Image myImg =Properties.Resources.SerbaAntik;
                            //if(Branch=="SBA"|Branch=="SMA")
                            //System.Drawing.Image myImg = Properties.Resources.Sarana;
                            //if(Branch=="SPA"|Branch=="SSG")
                            System.Drawing.Image myImg = Properties.Resources.Kharisma;
                            
                            
                            myImg.Save(ms, myImg.RawFormat);
                            
                            ms.Seek(0, SeekOrigin.Begin);
                            Novacode.Image img = doc.AddImage(ms);
                            Picture pic = img.CreatePicture();

                            //Paragraph phead = doc.InsertParagraph();
                            doc.AddHeaders();
                            Header H = doc.Headers.first;
                            Paragraph Phead = H.Paragraphs[0];
                            Phead.InsertPicture(pic, 0);
                            //phead.AppendPicture(pic);
                            doc.InsertParagraph(HeadTxt, false, HeadStyle);
                            doc.InsertParagraph(para1, false, ParaStyle);
                            doc.InsertParagraph(para2, false, ParaStyle);
                            doc.InsertParagraph(para3, false, ParaStyle);
                            // Save to the output directory:
                            doc.Save();
                            // Open in Word:
                            Process.Start("WINWORD.EXE", fileName); 
                        }
                    }