private void RebootComputer(object sender, EventArgs e) { try { _computerName = dataGridView1.SelectedCells[1].Value.ToString(); _computerBl = new BusinessComputer(); _computerBl.RebootComputer(_computerName); } catch (ArgumentOutOfRangeException) { MessageBox.Show("Lütfen tüm satırı seçiniz", "Uyarı", MessageBoxButtons.OK, MessageBoxIcon.Warning); } }