只会在第一次使用类的时候执行 public class User { public static readonly Color BackColor; static User() { DateTime now = DateTime.Now; if (now.DayOfWeek == DayOfWeek.Saturday) { BackColor = Color.Red; } else { BackColor = Color.Gray; } } }
转载于:https://www.cnblogs.com/xuyuchen/p/8283008.html
