private void btnSave_Click(object sender, EventArgs e) { if (btnSave.Text == "Add") { var tax = new Tax { ID = Guid.NewGuid(), Type = txtType.Text, Value = Decimal.Parse(txtValue.Text), EntryDate = DateTime.Now, Status = "Active" }; taxController.Add(tax); MessageBox.Show("Tax Added Sucessfully"); grdProducts.DataSource = taxController.GetAllDataTable(); } else { var tax = new Tax { ID = Guid.NewGuid(), Type = txtType.Text, Value = Decimal.Parse(txtValue.Text), EntryDate = DateTime.Now, Status = "Active" }; taxController.Update(TaxID, tax); grdProducts.DataSource = dtProducts = taxController.GetAllDataTable(); MessageBox.Show("Tax Updated Sucessfully"); } }