private void ResidentListBox_SelectedIndexChanged(object sender, EventArgs e) { if (ResidentListBox.SelectedItem != null) { int ssn; bool success = int.TryParse(ResidentListBox.SelectedItem.ToString(), out ssn); if (success) { Dictionary <string, object> resident = Resident.GetResident(ssn, dataWrapper); UpdateResidentUI(resident); } } }