SQL中的in和not in语法对应的LINQ写法

List<testInfo> listAll = new List<testInfo>();  
listAll.Add(new testInfo() { id = 1, name = "11", test = "111" });  
listAll.Add(new testInfo() { id = 2, name = "22", test = "222" });  
listAll.Add(new testInfo() { id = 3, name = "33", test = "333" });  
listAll.Add(new testInfo() { id = 4, name = "33", test = "333" });  
  
List<testInfo> listFind = new List<testInfo>();  
listFind.Add(new testInfo() { id = 1, name = "44", test = "111" });  
listFind.Add(new testInfo() { id = 2, name = "22", test = "222" });  
listFind.Add(new testInfo() { id = 3, name = "33", test = "333" });  
listFind.Add(new testInfo() { id = 4, name = "55", test = "333" });  
//SQL中的in和not in语法对应的LINQ写法  
//相当于查询语句：select * from listAll p where p.name not in(select f.name from listFind)  
var a = (from p in listAll  
         where !(from f in listFind select f.name).Contains(p.name)  
         select p).ToList();  

2.分页查询

int pageSize = 20;//每页记录数  
int pageIndex=1;//当前页  
        //分页  
       list = (from p in list  
             select p).Skip(pageSize * (pageIndex - 1)).Take(pageSize).ToList();