private void btnBeginMonitoring_Click(object sender, EventArgs e)
        {
            ParameterizedThreadStart threadStart = StartMonitoring;
            Thread secondaryThread = new Thread(threadStart);
            secondaryThread.Start(listbRunningProcesses.SelectedItem);
        }

        private void StartMonitoring(object processName)
        {
            while (Process.GetProcessesByName(processName.ToString()).Length >  0 )
                Thread.Sleep( 1000 );
            Thread.Sleep((int)numSleepTime.Value);
            Process.Start("Shutdown", "/s");
        }

        private void btnRefreshProcessList_Click(object sender, EventArgs e)
        {
            listbRunningProcesses.Items.Clear();
            foreach (Process process in Process.GetProcesses())
                listbRunningProcesses.Items.Add(process.ProcessName);
        }