private void btnFillBrass_Click(object sender, EventArgs e) { // Parameters : Finish, Valvecount, Cost, Manufacturer, Model, Instrument Type CBrass oBrass = new CBrass("Brass", 3, 34, "Getzen", "Seversen", InstrumentType.Trumpet); oBrasses.Add(oBrass); // Parameters : Finish, Valvecount, Cost, Manufacturer, Model, Instrument Type oBrass = new CBrass("Silver", 2, 456, "Bundy", "G6", InstrumentType.Tuba); oBrasses.Add(oBrass); dgvBrass.AutoGenerateColumns = true; dgvBrass.DataSource = oBrasses; }