#region 数组

            //初始化方式_0：先声明再赋值

            string[] weekDays_0 = new string[];

            weekDays_0[] = "Sun";

            weekDays_0[] = "Mon";

            weekDays_0[] = "Tue";

            weekDays_0[] = "Wed";//...

            //初始化方式_1：声明数组时即将其初始化...

            string[] weekDays_1 = new string[] { "Sun", "Mon", "Tue", "Wed", "Thu", "Fri", "Sat" };

            //初始化方式_1.5：声明数组时即将其初始化...快捷方式...

            string[] weekDays_2 = { "Sun", "Mon", "Tue", "Wed", "Thu", "Fri", "Sat" };

            //修改

            weekDays_0[] = "Mon";

            #endregion