Kill process in c#

        using System.Diagnostics;

        using System.Collections;

        Hashtable hashtable;

        protected void Button1_Click(object sender, EventArgs e)

        {

            // Get already running process ids before running the Export to Excel method

            GetExcelProcesses();

            //Export to Excel Method

            ExportToExcel();

            // Kill the right process after Export to Excel completed

            KillExcel();

        }

        private void ExportToExcel()

        {

            // your export process is here...

        }

        private void GetExcelProcesses()

        {

            hashtable = new Hashtable();

            Process[] process = Process.GetProcessesByName("excel");

  

            int count = 0;

            foreach (Process ExcelProcess in process)

            {

                hashtable.Add(ExcelProcess.Id, count);

                count++;

            }

        }

        private void KillExcel()

        {

            Process[] process = Process.GetProcessesByName("excel");

            // check to kill the right process

            foreach (Process ExcelProcess in process)

            {

                if (hashtable.ContainsKey(ExcelProcess.Id) == false)

                {

                    ExcelProcess.Kill();

                }

            }

            process = null;

        }