5.4.1 将匿名方法用于Action<T>委托类型

            Action<string> printReverse = delegate(string text)
            {
                char[] chars = text.ToCharArray();
                Array.Reverse(chars);
                Console.WriteLine(new string(chars));
            };

            Action<int> printRoot = delegate(int number)
            {
                Console.WriteLine(Math.Sqrt(number));
            };

            Action<IList<double>> printMean = delegate(IList<double> numbers)
            {
                double total = 0;
                foreach (double value in numbers)
                    total += value;
                Console.WriteLine(total / numbers.Count);
            };

            printReverse("Hello world!");
            printRoot(8);
            printMean(new double[] { 1.5, 234.2, 42.2, 564.2, 435.2, 444, 2424.5, 35327.7 });

　　　　      //代码精简的极端例子
            Console.WriteLine();
            List<int> x = new List<int>();
            x.Add(5);
            x.Add(10);
            x.Add(15);
            x.Add(20);
            x.Add(25);
            x.ForEach(delegate(int n)
            {
                Console.WriteLine(Math.Sqrt(n));
            });