C# Lambda表达式使用累加器事例

using System;using System.Collections.Generic;using System.Linq;using System.Text;namespace LambdaSample{    class Program    {        static void Main(string[] args)        {            int[] myIntArray = { 1,2, 3, 4, 5 };            //累加器计算数组总和            int result = myIntArray.Aggregate((paramA, paramB) => paramA + paramB);            int result1 = myIntArray.Aggregate<int>((paramA, paramB) => paramA + paramB);            int result2 = myIntArray.Aggregate<int, int>(0, (paramA, paramB) => paramA + paramB);            //递归计算数组总和            int result3 = count(5);            Console.WriteLine("The Result is: " + result);            Console.WriteLine("The Result1 is: " + result1);            Console.WriteLine("The Result2 is: " + result2);            Console.WriteLine("The Result3 is: " + result3);            string[] myStrArray = { "Admin", "Change", "ByPage" };            //字符串数组拼接            string strResult = myStrArray.Aggregate((paramA, paramB) => paramA + " " + paramB);            //字符串数组字符串总长度计算            int result4 = myStrArray.Aggregate<string, int>(0, (a, b) => a + b.Length);            //字符串数组拼接2，增加字符串"Some curries: "            string strResult1 = myStrArray.Aggregate<string, string>("Some curries: ", (a, b) => a + " " + b);            //字符串数组字符串总长度计算2            int result5 = myStrArray.Aggregate<string, string, int>("Some curries: ", (a, b) => a + " " + b, a => a.Length);            Console.WriteLine("The StrResult is: " + strResult);            Console.WriteLine("The Result4 is: " + result4);            Console.WriteLine(strResult1);            Console.WriteLine("The Result5 is: " + result5);            Console.ReadKey();        }        static int count(int n)        {            if (n == 1)            {                return 1;            }            return n + count(n - 1);        }    }}