private void addButton_Click(object sender, EventArgs e) { Item item = new Item(); item.Name = nameTextBox.Text; //Name unique check if (_itemManager.IsNameExists(item)) { MessageBox.Show(nameTextBox.Text + " Already Exists!"); return; } //Set Price as Mandatory if (String.IsNullOrEmpty(priceTextBox.Text)) { MessageBox.Show("Price Can not be Empty!!!"); return; } item.Price = Convert.ToDouble(priceTextBox.Text); bool isadded = _itemManager.AddMethod(item); if (isadded) { MessageBox.Show("Saved"); } else { MessageBox.Show("not saved"); } showDataGridView.DataSource = _itemManager.ShowMethod(); }