若不用类型推断此处类型因该改为什么c#

写了一个比较LINQ与常规方法,速度的代码,如下using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
//- 此程序用来比较常规方法和LINQ查询各自的速度-------结论是相差不大----排除类型推断可能相差无几....namespace _001
{
    class startup
    {
        static void Main(string[] args)
        {
            Person [] people = {
                           new Person("YM",21),
                           new Person("DJ",19),
                           new Person("OMG",30),
                           new Person("TA",25),
                       };
            long RoundSum = 100;
            long StartTime = 0;
            long EndTime = 0;
            StartTime = Environment.TickCount;
            
            for (int i = 0;i<RoundSum ; i++)
            {
                foreach(Person p in people)
                {
                    if (p.age >=26)
                    {
                        Console.WriteLine(p.name);
                    }
                }
            }
            EndTime = Environment.TickCount;
            Console.WriteLine("the traditional method cost {0}",EndTime - StartTime);
            Console.ReadKey();            StartTime = Environment.TickCount;
            for (int i = 0;i<RoundSum;i++)
            {
                var ageQuery=from p in people
                                  where p.age>=26
                                  select p;
                foreach (Person p in ageQuery)
                {
                    Console.WriteLine(p.name);
                }               
            }
            EndTime = Environment.TickCount;
            Console.WriteLine("the LINQ method cost {0}", EndTime - StartTime);
            Console.ReadKey();
            
        }
        class Person
        {
            public string name = "";
            public int age = 0;
            public Person(string _name,int _age)
            {
                name = _name;
                age = _age;
            }
        }
    }
}重点在.
 for (int i = 0;i<RoundSum;i++)
            {
                var ageQuery=from p in people
                                  where p.age>=26
                                  select p;
                foreach (Person p in ageQuery)
                {
                    Console.WriteLine(p.name);
                }               
            }若此处不用var,那么因该写成什么,写成Person[]或者Person都会提示查询语句里面某部分类型无法隐式转换.
用.gettype方法看ageQuery的类型,结果返回很长一串 的 类型...
谢谢