Asp。使用实体框架+ Npgsql.Entityframework访问Postgresql

I'm creating an ASP.NET MVC application which uses a PostgreSql database. Model classes are in a different class library. For access to database i'm using Entity Framework + Npgsql.Entityframework from Nuget in the class library. Also i added same links to main project. Configuration settings are in web.config of main project:I'm creating an ASP.NET MVC application which u