private void ButtonAirBlowing_Click(object sender, EventArgs e) { FormExistCustomer formExistCustomer = new FormExistCustomer(r_GarageManager); formExistCustomer.ShowDialog(); if (formExistCustomer.DialogResult == DialogResult.OK) { r_GarageManager.BlowVehicleWheels(formExistCustomer.CustomerToTreat); StringBuilder message = new StringBuilder(); message.AppendLine($"{formExistCustomer.CustomerToTreat.Name} Wheels blowed succesfully!"); string title = "Blowing Wheels"; MessageBox.Show(message.ToString(), title); } }