摘要：
using System;using System.Collections.Generic;using System.Linq;using System.Text;using System.Collections;namespace sln0716{ class Program { static void Main(string[] args) {// 案例：两个集合{ “a”,“b”,“c”,“d”,“e”}和{ “d”, “e”, “f”, “g”, “h” }，把这两个集合去除重复项合并成一个 //ArrayList al1 = new ArrayList() { "a&quo 阅读全文
