C#判断进程是否存在并结束进程

            System.Diagnostics.Process[] processList = System.Diagnostics.Process.GetProcesses();
            foreach (System.Diagnostics.Process process in processList)
            {
                if (process.ProcessName.ToUpper() == "WINRAR")
                {
                    MessageBox.Show("Y");

　　　　　　　　　　　　process.Kill(); //结束进程
                }
            }