C#Lambda表达式参考

 delegate void DelHandler();
        delegate int DelPlusHandler(int x,int y);
        static void Main(string[] args)
        {
            DelHandler handler = () => {        //无参数
                Console.WriteLine("您好，这是测试.");
            };
            handler();
            DelPlusHandler plusHandler = (int x, int y) =>x+y;      //单个表达式
            DelPlusHandler multiplyHandler = (int x, int y) => {    //多个表达式
                return x * y;
            };            
            Console.WriteLine( plusHandler(1, 4) );
            Console.WriteLine(multiplyHandler(3, 5));
            Console.ReadLine();


            /*
             *
             实际用法:
             IEnumerable<Customer>
             customers.Where(c => c.City == "London");

             int[] numbers = { 5, 4, 1, 3, 9, 8, 6, 7, 2, 0 };
             int oddNumbers = numbers.Count(n => n % 2 == 1);
             
             var firstNumbersLessThan6 = numbers.TakeWhile(n => n < 6);
             
             var firstSmallNumbers = numbers.TakeWhile((n, index) => n >= index);
             另外在linq中使用(略)
             * 
             */
        }