我正在嘗試connectionStrings從配置文件訪問(wèn)。代碼是ASP.NET + C＃。我已經(jīng)添加System.Configuration了參考，也提到了使用。但是它仍然不接受大會(huì)。我正在使用VSTS2008。您知道是什么原因嗎？另一個(gè)奇怪的事情是程序集名稱(chēng)顯示為“ System.configuration”，小寫(xiě)的c不會(huì)顯示其他系統(tǒng)程序集的名稱(chēng)。using System;using System.Collections.Generic;using System.Linq;using System.Text;using System.Configuration;namespace Utility{    public class CommonVariables    {        public static String ConnectionString        {            get { return ConfigurationManager.ConnectionStrings["EmployeeEntities"].ConnectionString; }        }      }  }配置：<?xml version="1.0" encoding="utf-8"?><configuration>  <connectionStrings>    <add name="qbankEntities" connectionString="metadata=res://*/qbankModel.csdl|res://*/qbankModel.ssdl|res://*/qbankModel.msl;provider=System.Data.SqlClient;provider connection string=&quot;Data Source=localhost;Initial Catalog=qbank;Persist Security Info=True;User ID=**;Password=****;MultipleActiveResultSets=True&quot;" providerName="System.Data.EntityClient" />  </connectionStrings></configuration>