Is the combination of ADO.NET Entity Framework and ASP.MVC wrong by any chance?

I have one solution with three projects. - DomainModel (C# Library with ADO.NET Entity Framework) - DomainModelTest (Unit Testing for Business Logic) - WebApp (Using DomainModel) For some reason, I cannot even bring the view if I pass any of the objects in the DomainModel, not even simple. I get the error below: Any ideas? Compiler Error Message: CS0012: The type 'System.Data.Objects.DataClasses.EntityObject' is defined in an assembly that is not referenced. You must add a reference to assembly 'System.Data.Entity, Version=3.5.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089'. Source Error: Line 146: Line 147: [System.Runtime.CompilerServices.CompilerGlobalScopeAttribute()] Line 148: public class views_home_index_aspx : System.Web.Mvc.ViewPage, System.Web.SessionState.IRequiresSessionState, System.Web.IHttpHandler { Line 149: Line 150: private static bool @__initialized; I thought this might be helpful, the actual error comes up on the Default.aspx file in the line pointed below: ``` public partial class _Default : Page { public void Page_Load(object sender, System.EventArgs e) { // Change the current path so that the Routing handler can correctly interpret // the request, then restore the original path so that the OutputCache module // can correctly process the response (if caching is enabled). string originalPath = Request.Path; HttpContext.Current.RewritePath(Request.ApplicationPath, false); IHttpHandler httpHandler = new MvcHttpHandler(); httpHandler.ProcessRequest(HttpContext.Current); //**HERE** HttpContext.Current.RewritePath(originalPath, false); } } ```