c# - How can i call DLL function in website runnng on .NET 2 -

i'm working on website, trying call function c# dll through default.asmx.cs

it works fine .net version 3.5, our production site .net 2.0

i'm using simple ajax request call method in default.asmx , there dll. found can not use [webmethod] in net2, other way work around this?

//this handler public partial class _default : system.web.ui.page {     protected void page_load(object sender, eventargs e)     {      }     [system.web.services.webmethod]     public static string removeautorecharge(string custserviceid)     {         class1 jp = new class1();         return jp.removecustomerautorecharge(custserviceid);     } } 

//ajax call:

$.ajax({     type: "post",     url:"default.asnx/removeautorecharge",     data: "{custid:123}",     contenttype: "application/json; charset=utf-8",     datatype: "json",     complete:function (xhr, status)     {         alert(xhr.responsetext);         alert(xhr.status);     },         success: function(result)      {         $('#automsg').html(result.d);     },     error: function(xmlhttprequest, status, err)      {         $('#automsg').html("error!")     } }); 

do have source code dll? [webmethod] works in .net 2. perhaps can modify project created binary, , make .net 2 project.

    [webmethod]     public string helloworld()     {         return "hello world";     } 

this ran using .net 2 project: