private void button2_Click_1(object sender, EventArgs e)
        {
            string che;
            for (int i = 1; i < dataGridView1.Rows.Count; i++)
            {
                che = dataGridView1.Rows[i - 1].Cells[4].Value.ToString();

                if (che == "True")
                { ДЕЙСТВИЕ }
            }
        }