/*----------Lambda             * */            //--如果仅有一个入参，则可省略圆括号。            Console.WriteLine("*************************************");            Action dummyLambda = () =>                 {                     Console.WriteLine("Hello World from a Lambda expression!");                 };            dummyLambda();            //--如果仅有一行语句，并且在该语句中返回，则可省略大括号，并且也可以省略 return 关键字。            Func<double, double> square = x => x * x;            double douResult = square(5);            Console.WriteLine(douResult);            Func<double, double, double> product = (x, y) => x * y;            double proResult = product(5, 6);            Console.WriteLine(proResult);            Action<double, double> printProduct = (x, y) => { Console.WriteLine(x * y); };            printProduct(5, 9);            Func<double[], double[], double> dotProduct = (x, y) =>            {                var dim = Math.Min(x.Length, y.Length);                var sum = 0.0;                for (var i = 0; i != dim; i++)                    sum += x[i] + y[i];                return sum;            };            double dotResult = dotProduct(new double[] { 1, 2, 3 }, new double[] { 4, 5, 6 });            Console.WriteLine(dotResult);