目前报这个错误：
“System.InvalidOperationException”类型的未经处理的异常在 mscorlib.dll 中发生
其他信息: The Entity Framework provider type 'MySql.Data.MySqlClient.MySqlClientFactory, MySql.Data' registered in the application config file for the ADO.NET provider with invariant name 'MySql.Data.MySqlClient' could not be loaded. Make sure that the assembly-qualified name is used and that the assembly is available to the running application. See http://go.microsoft.com/fwlink/?LinkId=260882 for more information.
有人遇到过嘛。。。或者有没有在VS2013下使用Entity Framework成功连接MySql的经验。（在VS2010下通过EF连接MySql没问题；在VS2013直接（不用EF）连接MySql也没问题。）
