Linq快速入门——扩展方法

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;

namespace Linq
{
    public static  class 扩展方法Helper
    {
        public static string ToMyUpper(this string helper)
        {
            return "\""+helper.ToUpper() + "\"";
        }

        public static string Quoted(this string helper,string a,string b)
        {
            return a + helper + b;
        }
        public static bool IsNumber(this string helper)
        {
            int i;
            return int.TryParse(helper,out i);
        }
        public static string ToChineses(this bool helper)
        {
            return  helper ? "真" : "假";
        }
        public static int CreateMan(this Person helper)
        {
            Person one = new Person { Age=18,Name="Eyes"};
            return one.Age;
        }
    }
    public class Person
    {
        public int Age { get; set; }
        public string Name { get; set; }
    }
}

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;

namespace Linq
{
    class Program
    { 
        static void Main(string[] args)
        {

            Person p = new Person();
            Console.WriteLine(p.Name.IsNumber().ToChineses());
            Console.ReadKey();
        }
    }
}