ASP.NET MVC4 with MySQL: Configuration Error (MySql.Web.v20)

今天在浏览ASP.NET项目时，提示如下错误：

Could not load file or assembly ‘MySql.Web.v20, Version=6.9.4.0, Culture=neutral, PublicKeyToken=c5687fc88969c44d‘ or one of its dependencies

<providers>
<add name="AspNetSqlRoleProvider" connectionStringName="LocalSqlServer" applicationName="/" type="System.Web.Security.SqlRoleProvider, System.Web, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a" />
<add name="AspNetWindowsTokenRoleProvider" applicationName="/" type="System.Web.Security.WindowsTokenRoleProvider, System.Web, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a" />
<add name="MySQLRoleProvider" type="MySql.Web.Security.MySQLRoleProvider, MySql.Web.v20, Version=6.9.4.0, Culture=neutral, PublicKeyToken=c5687fc88969c44d" connectionStringName="LocalMySqlServer" applicationName="/" />
</providers>

<add name="MySQLRoleProvider" type="MySql.Web.Security.MySQLRoleProvider, MySql.Web.v20, Version=6.9.4.0, Culture=neutral, PublicKeyToken=c5687fc88969c44d" connectionStringName="LocalMySqlServer" applicationName="/" />

网上查阅后找到如下解决方法，特此记录：

原文:

This error occurs when you install MySQL .NET Connector 6.9.4 (probably other versions too) because if you do not uncheck "Web Providers" during the installation it writes in your machine.config which brings you to this error.

译：安装MySQL.NET 6.9.4（或者其他版本的）时，如果不取消“Web Providers”选项，便会在安装过程中修改你的machine.config配置文件，从而导致这个错误发生。（小学生英语水平，翻译不足之处，还请多多见谅^^&）

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原文地址:http://stackoverflow.com/questions/26189699/asp-net-mvc4-configuration-error-after-installing-mysql-connector-net