case "操作指导":
                     1   string Sn = Application.StartupPath + "\\操作指导\\" + Gzbz.czzn;

                       if (Sn != null)
                        {
                            if ((Sn))
                            {
                     2.          System.Diagnostics.ProcessStartInfo startInfo = new System.Diagnostics.ProcessStartInfo("WINWORD.exe");
                                startInfo.WindowStyle = System.Diagnostics.ProcessWindowStyle.Maximized;
                                startInfo.Arguments = Sn;
                                System.Diagnostics.Process.Start(startInfo);
                                return;
                            }
                           
                        }
                        MessageBox.Show(Gzbz.GZ + "(" + Gzbz.BZLX + ")的操作指导不存在!", "提示");
一直显示失败 我写标记的1 2 行是怎么个意思我在百度上看了个差不多 但是由于对几个方法的理解不深没搞明白他的路径是怎么体现的（比如说我的操作指导在D\我的程序\操作指导\操作指导.doc那程序应该怎么体现？？？）