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I have a web MVC project with Entity Framework 4.x working fine. <br />
<br />
Now I added a class library project in the same solution, and I have mapped different database tables successfully. .edmx is generated. Then I write a simple test class and try to build the this new project. I got error - The namespace name Infrastructure does not exist in a namespace System.Data.Entity ...<br />
<br />
I googled it and was said I need a reference to the EntityFramework or need to install EntityFramework. I'm confused, as I already have a web MVC project working, and also .edmx has been built in the new class library project. So EntityFramework should not be a problem...?<br />
<br />
What should do to remove this error? <br />
<br />
I may need to add a reference to the class library project in the existing web project, so that the web project can use classes defined in the class library project, right?<br />
<br />
I appreciate any help.
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I have a web MVC project with Entity Framework 4.x working fine. 

Now I added a class library project in the same solution, and I have mapped different database tables successfully. .edmx is generated. Then I write a simple test class and try to build the this new project. I got error - The namespace name Infrastructure does not exist in a namespace System.Data.Entity ...

I googled it and was said I need a reference to the EntityFramework or need to install EntityFramework. I'm confused, as I already have a web MVC project working, and also .edmx has been built in the new class library project. So EntityFramework should not be a problem...?

What should do to remove this error? 

I may need to add a reference to the class library project in the existing web project, so that the web project can use classes defined in the class library project, right?

I appreciate any help.

Refernce to Entity Framework

C# is an object-oriented programming language created in conjunction with Microsoft’s .NET framework. Compilation is usually done into the Microsoft Intermediate Language (MSIL), which is then JIT-compiled to native code (and cached) during execution in the Common Language Runtime (CLR).

Most development for the Microsoft platform is done utilizing the technologies supported by the.NET framework. Other development is done using Visual Basic for Applications (VBA) for programs like Access, Excel, Word and Outlook, with PowerShell for scripting, or with SQL for large databases.