web/_layouts/handler/ahandler.ashx を参照すると、このエラーが発生しました
 An error occurred during the processing of /_layouts/handler/ahandler.ashx. Could not create type 'BabyClubDemo.Layouts.Handler.AHandler'.
ここに私のashxページがあります
<%@ WebHandler Language="C#" CodeBehind="AHandler.ashx.cs" Class="BabyClubDemo.Layouts.Handler.AHandler" %>
ここに私のashx.csがあります
using System;
using System.Web;
namespace BabyClubDemo.Layouts.Handler
{
public class AHandler : IHttpHandler
{
    /// <summary>
    /// You will need to configure this handler in the web.config file of your 
    /// web and register it with IIS before being able to use it. For more information
    /// see the following link: http://go.microsoft.com/?linkid=8101007
    /// </summary>
    #region IHttpHandler Members
    public bool IsReusable
    {
        // Return false in case your Managed Handler cannot be reused for another request.
        // Usually this would be false in case you have some state information preserved per request.
        get { return false; }
    }
    public void ProcessRequest(HttpContext context)
    {
        context.Response.Clear();
        context.Response.ContentType = "application/json; charset=utf-8";
        context.Response.Write(CallServerFunction(context));
    }
    private string CallServerFunction(HttpContext context)
    {
        return "testing the applicaiton";
    }
    #endregion
}
}
考えられる問題は何ですか? 私の .net フレームワークは 3.5 です。