using System.Threading.Tasks;
static string auto = string.Empty;
public static void Main()
Console.WriteLine("NATIONALITYCODE".ToLower());
Console.WriteLine("NATIONALITYCOUNTRYID".ToLower());
AsyncTask().GetAwaiter().GetResult();
public static async Task AsyncTask()
await HasExecptionAsync();
public static async Task HasExecptionAsync()
throw new InvalidOperationException("拋出例外異常");