Your project references the latest version of Entity Framework... - Error

"Your project references the latest version of Entity Framework" Problem with VS 2017 and Oracle 12cWhen we add item ADO.NET Entity Data Model with Oracle connection then error message displaying "Your project references the latest version of Entity Framework..."

Resolution steps are here ;

1. Install Oracle ODTwithODAC122010 as a 32Bit

2. Create Your Project in VS2017

3. Change Active Solution Platform to 32 Bit from AnyCPU

4. Open Tools->Nuget PackageManager-> Manage Nuget Packages for Solution

5-Write Browse Area "ODP" and Install Following Program

• Oracle. ManagedDataAccess

• Oracle.ManagedDataAccess.EntityFramework

6- Open Tools->Nuget PackageManager-> Package Manager Console

7- Write this

- Install-Package EntityFramework -Version 6.1.1  and Enter

8-Re-Start Visual Studio to finish the process

8-Re-Build your application

8- Add new item ADO.NET Entity Data Model

9-If required Add New Connection to Oracle (Data Source = Oracle Database(ODP.NET, Managed Driver))

10 - Everything is OK.

Note : I quess EF6.1.3 is not working with VS2017 and Oracle ODTwithODAC122010. But after all of these process I have changed EF as a EF6.1.3 it is working But I do not advice you.

I met this problem today. Then I resolved by following steps:

Normally, in case we wanna use MySQL with Entity Framework, we will add some DLLs such as MySql.Data, MySql.Data.Entity.EF6.

But we forgot one thing that Visual Studio need to work with MySQL.

That's adding configurations on App.config/Web.config:

<configSections>    <!-- For more information on Entity Framework configuration, visit http://go.microsoft.com/fwlink/?LinkID=237468 -->    <section name="entityFramework" type="System.Data.Entity.Internal.ConfigFile.EntityFrameworkSection, EntityFramework, Version=6.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089" requirePermission="false" />  </configSections><entityFramework>    <defaultConnectionFactory type="System.Data.Entity.Infrastructure.LocalDbConnectionFactory, EntityFramework">      <parameters>        <parameter value="mssqllocaldb" />      </parameters>    </defaultConnectionFactory>    <providers>      <provider invariantName="System.Data.SqlClient" type="System.Data.Entity.SqlServer.SqlProviderServices, EntityFramework.SqlServer" />    <provider invariantName="MySql.Data.MySqlClient" type="MySql.Data.MySqlClient.MySqlProviderServices, MySql.Data.Entity.EF6, Version=6.9.9.0, Culture=neutral, PublicKeyToken=c5687fc88969c44d"></provider></providers>  </entityFramework><system.data>    <DbProviderFactories>      <remove invariant="MySql.Data.MySqlClient" />      <add name="MySQL Data Provider" invariant="MySql.Data.MySqlClient" description=".Net Framework Data Provider for MySQL" type="MySql.Data.MySqlClient.MySqlClientFactory, MySql.Data, Version=6.9.9.0, Culture=neutral, PublicKeyToken=c5687fc88969c44d" />    </DbProviderFactories>  </system.data>

Then, Build your whole projects and try again.

Another solution is: using Nuget to add MySQL dlls. It will be added configurations into App.config/Web.config file

you have to go to your proyect-->properties-->Compile-->And set platform to x86

Save all changes, rebuild, add the Entity Data Model and now it will work.

It happened to us at our job a lot of times!

This is because the ODT is for 32 bit, and probably you have your project in AnyCpu or x64 and your Operating System is x64.

Hope it helps