private void button1_Click(object sender, EventArgs e)
 {
     using (Zerno f = new Zerno())
     {
         f.ShowDialog();
         this.OnLoad(e);
     }
 }
        private void dataGridView1_CellDoubleClick(object sender, DataGridViewCellEventArgs e)
        {
            Items.Dostup = 1;
            Items.listItems.Clear();

            for (int i = 1; i <= dataGridView1.ColumnCount - 1; i++)
            {
                Items.listItems.Add(dataGridView1.Rows[e.RowIndex].Cells[i].Value.ToString());
            }
            using (Zerno f = new Zerno())
            {
                f.ShowDialog();
                this.OnLoad(e);
            }
        }