一、Linq简介

 class Program
    {
        static void Main(string[] args)
        {
            //定义数据源
            int[] scores = new int[] {1,3,4,5,7,9,12,15 };

            //编写查询表达式
            IEnumerable<int> scoreQuery =
                from score in scores
                where score%2==0
                select score;

            //使用foreach执行查询,不能用for
            foreach (int i in scoreQuery) {
                Console.WriteLine(i);
            }
            Console.ReadKey();
        }
    }