How to programmatically set cell value in DataGridView?

Question

I have a DataGridView. Some of the cells receive their data from a serial port: I want to shove the data into the cell, and have it update the underlying bound object.

Answer 1

private void btn_Addtoreciept_Click(object sender, EventArgs e)
{            
    serial_number++;
    dataGridView_inventory.Rows[serial_number - 1].Cells[0].Value = serial_number;
    dataGridView_inventory.Rows[serial_number - 1].Cells[1].Value =comboBox_Reciept_name.Text;
    dataGridView_inventory.Rows[serial_number - 1].Cells[2].Value = numericUpDown_recieptprice.Value;
    dataGridView_inventory.Rows[serial_number - 1].Cells[3].Value = numericUpDown_Recieptpieces.Value;
    dataGridView_inventory.Rows[serial_number - 1].Cells[4].Value = numericUpDown_recieptprice.Value * numericUpDown_Recieptpieces.Value;
    numericUpDown_RecieptTotal.Value = serial_number;
}

on first time it goes well but pressing 2nd time it gives me error "Index was out of range. Must be non-negative and less than the size of the collection. Parameter name: index" but when i click on the cell another row appears and then it works for the next row, and carry on ...