//Code App_


using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.IO;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;


namespace App_
{
    public partial class Form1 : Form
    {
        List<string> filesAdded = new List<string>();
        FileSystemWatcher Guarding = new FileSystemWatcher();
        public Form1()
        {
            InitializeComponent();
        }

        private void Form1_Load(object sender, EventArgs e)
        {
            System.Windows.Forms.Control.CheckForIllegalCrossThreadCalls = false;
            listView1.RetrieveVirtualItem += new RetrieveVirtualItemEventHandler(listView1_RetrieveVirtualItem);
            listView1.VirtualMode = true;
            listView1.View = View.Details;
            listView1.GridLines = true;
            listView1.Columns.Add("Filename", 600);
            string sOri = @"C:\";
            Guarding.Path = sOri;
            Guarding.IncludeSubdirectories = true;
            Guarding.Created += new FileSystemEventHandler(OnCreated);
            Guarding.EnableRaisingEvents = true;
        }
        void OnCreated(object source, FileSystemEventArgs e)
        {
            filesAdded.Add(e.FullPath);
            listView1.VirtualListSize = filesAdded.Count();
        }
        void listView1_RetrieveVirtualItem(object sender, RetrieveVirtualItemEventArgs e)
        {
            var item = new ListViewItem();
            if (filesAdded.Count > 0)
            {
                item.Text = filesAdded[e.ItemIndex];
            }
            e.Item = item;
        }
    }
}


==========================================================

//Code Main_

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;

namespace Main_
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }

        private void Form1_Load(object sender, EventArgs e)
        {

        }

        private void button1_Click(object sender, EventArgs e)
        {
            Main_.StartStop_.Start(@"C:\Users\family\Desktop\App_.exe");
        }

        private void button2_Click(object sender, EventArgs e)
        {
            Main_.StartStop_.Stop();
        }
    }
}

//Class StartStop_

using System;
using System.Collections.Generic;
using System.Diagnostics;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace Main_
{
    class StartStop_
    {
        public static Process Start(string procname)
        {
            Process Prog_ = new Process();
            Prog_.StartInfo.FileName = procname;
            Prog_.Start();
            return Prog_;
        }
        public static void Stop(Process Prog_)
        {
            //Prog_.Kill();

            int IDstring = System.Convert.ToInt32(Prog_.Id.ToString());
            Process tempProc = Process.GetProcessById(IDstring);
            tempProc.CloseMainWindow();
            tempProc.WaitForExit();
        }


    }
}