C# SL / Datagrid Seçilen Satırda Herhangi Bir Hücredeki Veriyi Alma

private void dataGridView1_CellMouseClick(object sender, DataGridViewCellMouseEventArgs e)
        {
            string deger = dataGridView1.SelectedCells[0].Value.ToString();
            MessageBox.Show(deger);
        }

void IndexChange_Command(Object sender, EventArgs e)
      {

         // Display the details of the selected item.
         DetailsLabel.Text =
            "Item Number: " + ItemsGrid.SelectedItem.Cells[1].Text + "<br />" +
            "Description: " + ItemsGrid.SelectedItem.Cells[2].Text + "<br />" +
            "Price: $" + ItemsGrid.SelectedItem.Cells[3].Text + "<br />";

      }

dataGridView1.CurrentRow.Cells[0].Value;

dataGridView1.CurrentRow.Cells[1].Value;