private void button5_Click(object sender, EventArgs e)
        {
            string t1 = "Автор";
            string t2 = "Потребитель";
         
            
            // Вкл\выкл чекбоксов по условию
            for (int i = 0; i < this.dataGridView2.RowCount; i++)
            {
                string s = this.dataGridView2[3, i].Value.ToString();
                if (s == "") s = "0";
                if (int.Parse(s) < 1)
                {
                    

                   // MessageBox.Show(t1.ToString());
                this.dataGridView2[3, i].Value = t2;
                }
                else
                {
                    
                   // MessageBox.Show(t2.ToString());
                   this.dataGridView2[3, i].Value = t1;
                }
            }
        }

private void button6_Click(object sender, EventArgs e) //TEST
        {
            string t1 = "Автор";
            string t2 = "Потребитель";

            DataGridViewComboBoxColumn cb = new DataGridViewComboBoxColumn();
            cb.HeaderText = "TEST";
            cb.Items.AddRange(new string[] { t2 , t1});
            dataGridView2.Columns.Add(cb);

            for (int i = 0; i < this.dataGridView2.RowCount; i++)
            {
                string s = this.dataGridView2[3, i].Value.ToString(); // столбец Автор\Потребитель
                if (s == "") s = "0";
                if (int.Parse(s) < 1)
                {
                    this.dataGridView2[4, i].Value = t2;
                }

                else
                {
                    this.dataGridView2[4, i].Value = t1;
                }
            }
        }

// Начать поиск ...
        private void button1_Click(object sender, EventArgs e)
        {
            dataGridView1.Rows.Clear();
            label10.Visible = true;
            button1.Enabled = false;
            t_file.Enabled = false;
            label10.Text = "В процессе ...";
            label10.ForeColor = Color.OrangeRed;
            label5.Enabled = false; label6.Enabled = false; label7.Enabled = false; label8.Enabled = false;


            backgroundWorker1.RunWorkerAsync(a); //запуск backgroundWorker1
        }

        private void backgroundWorker1_DoWork(object sender, DoWorkEventArgs e) // визуальное добавление найденых адресов файлов в листбокс
        {
            foreach (string pth in listBox2.Items)
            {
            string a = pth.ToString();
            string fil = t_file.Text;

            string[] allFoundFiles = Directory.GetFiles(a, fil, SearchOption.AllDirectories);
            foreach (string file in allFoundFiles)
            {
                dataGridView1.Invoke(new MethodInvoker(() => dataGridView1.Rows.Add(file))); // добавление файлов в datagridview
                Thread.Sleep(100); // пауза
            }

            }

            Invoke(new Action(() =>
           {
               label10.Text = "Выполнено";
               label10.ForeColor = Color.Green;
               button1.Enabled = true;
               t_file.Enabled = true;
               label5.Enabled = true; label6.Enabled = true; label7.Enabled = true; label8.Enabled = true;
           }));
        }

// Стоп поиск ...
        private void button5_Click(object sender, EventArgs e)
        {
            backgroundWorker1.WorkerSupportsCancellation = true;
            backgroundWorker1.CancelAsync();
            backgroundWorker1.Dispose();
        }

var foundFiles = dirSearch.GetFiles().Where(file => file.LastWriteTime >= dateTimePicker1.Value && file.LastWriteTime <= dateTimePicker2.Value);

foreach (string pth in listBox2.Items)
            {
            string a = pth.ToString();
            string fil = t_file.Text;
            string create_date = textBox1.Text;
            //string s_date = textBox2.Text;
            //string p_date = textBox3.Text;
    
            string[] allFoundFiles = Directory.GetFiles(a, fil, SearchOption.AllDirectories);
            foreach (string file_ in allFoundFiles)
            {

                dataGridView1.Invoke(new MethodInvoker(() => dataGridView1.Rows.Add(file_))); // добавление файлов в datagridview
                Thread.Sleep(100); // пауза
            }

            }