一: ConverAll 2.0 } 3.0? 二: Exists 2.0 Array.Exists(students, anders); 3.0 string[] students = { "Anders", "Jeff" }; return students.Any(name => name == "anders"); 相关文章: 2022-12-23 2021-07-21 2021-11-18 2021-11-18 2021-08-18 2022-12-23 2022-01-09