asp.net – 分析器错误消息：无法生成代码.抛出了类型’System.D

<Connection AppSettingsObjectName="Web.config" AppSettingsPropertyName="BannerCS" ConnectionStringObject="" IsAppSettingsProperty="true" Modifier="Assembly" Name="BannerCS (Web.config)" ParameterPrefix=":" PropertyReference="AppConfig.System.Configuration.ConfigurationManager.0.ConnectionStrings.BannerCS.ConnectionString" Provider="Oracle.ManagedDataAccess.Client" />

在网站项目的.XSD文件中
我在web.config文件中有以下连接

<add name="BannerCS" connectionString="DATA SOURCE=******;PASSWORD=**********;PERSIST SECURITY INFO=True;USER ID=*********"
  providerName="Oracle.ManagedDataAccess.Client" />

我可以通过在数据集的数据表中运行SQL查询来查看数据.基于.net 3.5的网站项目也不会在编译时出现任何错误.但是,当我运行应用程序时,它会出现此错误.

当我添加引用时

Oracle.ManagedDataAccess.dll

通过在web.config中添加它

<add assembly="Oracle.ManagedDataAccess,Version=4.121.1.0,Culture=neutral,PublicKeyToken=89B483F429C47342"/>

它给出了这个错误

Configuration Error 
  Description: An error occurred during the processing of a configuration file required to     service this request. Please review the specific error details below and modify your configuration file appropriately. 

 Parser Error Message: Could not load file or assembly 'Oracle.ManagedDataAccess,PublicKeyToken=89b483f429c47342' or one of its dependencies. The system cannot find the file specified.