用dsoframer 打开excel 后,关闭dsoframer 怎么删除这个excel进程

/// <summary>
        /// 将占用一小时已上的EXCEL进程已经之前打开的EXCEL全部杀掉。
        ///  打开EXCEL用时间 分秒毫秒，判断时间来杀EXCEL进程
        /// </summary>
        public void KillExcelProceed()
        {
            try
            {
                PerformanceCounter PC = new PerformanceCounter();//性能计数器
                System.Diagnostics.Process[] ExcelProcesses;
                ExcelProcesses = System.Diagnostics.Process.GetProcessesByName("EXCEL");
 
                foreach (System.Diagnostics.Process IsProcedding in ExcelProcesses)
                {
                    if (IsProcedding.ProcessName == "EXCEL")
                    {
                        PC.InstanceName = IsProcedding.ProcessName;
                        DateTime start = IsProcedding.StartTime;
                        TimeSpan ss = DateTime.Now - start;
                        if ((ss.Hours >= 1 || ss.Minutes > 10) || (startExcelTime.Day == start.Day && startExcelTime.Hour == start.Hour && startExcelTime.Minute == start.Minute && startExcelTime.Second == start.Second && startExcelTime.Millisecond == start.Millisecond))
                        {
                            if (!IsProcedding.HasExited)
                            {
                                try
                                {
                                    IsProcedding.Kill();
                                }
                                catch (Exception ex)
                                {
 
                                }
                            }
                        }
 
                    }
                }
            }
            catch (Exception ex)
            {
 
            }
 
 
 
        }