static void TestConfigUtil() { string value1 = ConfigUtil.Settings["key1"]; Console.WriteLine($"key1 = {value1}"); Console.Write($"Please input value: "); string str = Console.ReadLine(); ConfigUtil util = new ConfigUtil(ConfigType.EXE); util.AddAppSetting("key1", str); util.Save(); value1 = util.AppSettings["key1"]; Console.WriteLine($"key1 = {value1}"); value1 = ConfigUtil.Settings["key1"]; Console.WriteLine($"key1 = {value1}"); }