ASMX Web服务在添加dll或用于创建该dll的类项目时抛出错误

Question

我在Visual Stdio 2008中创建了一个示例C＃ASP .NET Web服务。我收到错误

System.Runtime.InteropServices.COMException: Retrieving the COM class factory for component with CLSID  错误代码80040154 同时尝试将项目作为参考。

错误An attempt was made to load a program with an incorrect format无法在添加DLL作为参考时加载程序集错误。

编辑：我能够在C＃Console应用程序项目中调用相同的dll并访问其中的函数。 我只是在webservice项目中调用它时才收到错误。

以下是我的Service1.asmx.cs

的内容

using System;
using System.Collections;
using System.ComponentModel;
using System.Data;
using System.Linq;
using System.Web;
using System.Web.Services;
using System.Web.Services.Protocols;
using System.Xml.Linq;
using COMClient;

namespace DLLWebService
{
    /// <summary>
    /// Summary description for Service1
    /// </summary>
    [WebService(Namespace = "http://tempuri.org/")]
    [WebServiceBinding(ConformsTo = WsiProfiles.BasicProfile1_1)]
    [ToolboxItem(false)]
    // To allow this Web Service to be called from script, using ASP.NET AJAX, uncomment the following line. 
    // [System.Web.Script.Services.ScriptService]
    public class Service1 : System.Web.Services.WebService
    {
        [WebMethod]
        public string HelloWorld()
        {
            return "Hello World";
        }
        [WebMethod]
        public string GetInfo()
        {
            COMClient.DLLCOMWrapper obj = new COMClient.DLLCOMWrapper();
            //String returnedInfo = obj.Info();
            return "hi";
        }
    }
}