一、关于匿名类型的特性1、匿名类型定义：匿名对象var vobj = new { id = "编号", title = "标题", content = "内容" };访问：var id = vobj.id;结果：编号2、结合匿名数组应用定义：集合初始化器var article = new[]{    new { id = "编号一", title = "标题一", content = "内容一" }	new { id = "编号二", title = "标题二", content = "内容二" }};访问：var title = article[1].title;结果：标题二3、结合匿名集合List集合定义：var list = article.ToList();	//Array转为Listlist.Add(new { id = "编号三", title = "标题三", content = "内容三" });article = list.ToArray();		//List转为Array访问：var content = article[2].content;结果：内容三4、结合JavaScriptSerializer序列化var str = new System.Web.Script.Serialization.JavaScriptSerializer().Serialize(list);结果：JSON字符串5、结合结合控件DropDownList ddl = new DropDownList();ddl.DataSource = list;ddl.DataTextField = "title";ddl.DataValueField = "id";ddl.DataBind();注：var关键字是C# 3.0开始新增的特性，只能用于局部变量使用（隐式类型变量）6、Dictionary集合Dictionary
     
       dic = new Dictionary
      
       ();dic.Add("key", "value");注：键不允许重复7、NameValueCollection集合NameValueCollection col = new NameValueCollection(); col.Add("key", "value");注：如果键值相同则合并8、Hashtable集合Hashtable ht = new Hashtable();  ht.Add("key","value");注：键不允许重复9、List集合List
       
         list = new List
        
         ();list.Add("String");注：任意，没有键/值10、集合与LINQ检索表达式using System.Linq;using System.Collections; int[] items = new int[] { 1, 2, 3, 4, 5 };IEnumerable
         
           ints = from item in items                        where item > 2.5                        select item;foreach (var p in ints){    Console.WriteLine(p);} 关于：IEnumerable实例应用：通过Linq查找再遍历，然后以JSON的格式输出到客户端；11、集合迭代器public System.Collections.IEnumerator GetEnumerator(){    string[] days = { "Sun", "Mon", "Tue", "Wed", "Thr", "Fri", "Sat" };    for (int i = 0; i < days.Length; i++)    {        yield return days[i];    }}