IEnumerable 遍历用法

     public static void Print(IEnumerable myList)
        {
            int i = 0;
            foreach (Object obj in myList)
            {
                if (obj is Student)//这个是类型的判断，这里Student是一个类或结构
                {
                    Student s=(Student)obj;
                    Console.WriteLine("\t[{0}]:\t{1}", i++, s.Sname);
                }
                if (obj is int)
                {
                    Console.WriteLine("INT:{0}",obj);
                }
            }
            Console.WriteLine();
        }

List<string> fruits = new List<string> { "apple", "orange", "banana" };
            //去遍历
            IEnumerable<string> query = fruits.Where(fruit => fruit.Length == 6);
            foreach (var q in query)
            {
                Console.WriteLine(q);
            }
       Console.ReadLine();