The name 'ObservableCollection' was not found in the type or namespace.

'DbContext' was not identified as a type or namespace.

I had the same issue. Turns out, you need the EntityFramework.dll reference (and not System.Data.Entity)....I just pulled it from the MvcMusicStore application which you can download from: ...http://mvcmusicstore.codeplex.com/...It's also a useful example of how to use entity framework code-first with MVC.

The type or namespace name 'Column' could not be found

I had the correct ...using... statements ......I had this problem despite having the correct ...using... statements....In my case, my project was generated by dotPeek after decompiling a dll (the original source code was lost)....dotPeek created the project with a reference to a copy of EntityFramework.dll just sitting in some folder, not being man...

The navigation property 'FootballGame' was not found on the dependent type 'Bd.Domain.Entities.FootballGame'

I am creating my first asp.net mvc3 application. I'm using code first methodology. I have the following models:...public class FootballGame { [Key] public Guid id_FootballGame { get; set; } [ForeignKey("FootballGame")] public Guid? FK_id_FootballGame { get; set; } public virtual FootballGame PreviousFootballGame { get; set; } ...

Compiling transformation: The type or namespace name could not be found when running TypeLite.tt

Disclaimer: I'm new to just about every piece of technology I am using here, so forgive me please if I am missing the obvious......I am starting to mess with MVC 4 with Entity Framework 5 and Web API, and I want to use TypeScript with Knockout to do some UI stuff. I found the TypeLite project which will take my EF model and generate TypeScript in...

Entity Framework does not generates ObservableCollection

Open the Solution Explorer and find .edmx file...Find the .tt file which will be nested under the .edmx file...Double-click on the XXXModel.tt file to open it in the Visual Studio editor...Find and replace the two occurrences of “ICollection” with “ObservableCollection”. These are located approximately at lines 296 and 484....Find and repla...

The type or namespace name 'DbContext' could not be found (EF installed)

I am using VS 2012. I installed with Nuget the ...EntityFramework... (version 6.1.1), and add references to the ...System.Data... and ...System.Data.Entity..., but when I open a new class in the solution and refering to DbContext, it says:..."The type or namespace name 'DbContext' could not be found (are you missing a using directive or an assemb...

The type or namespace name 'Key' could not be found

I got same error using Visual Studio 2010 when I was creating an asp.net Webforms application. I followed these steps and it worked for me....open nugetpackage manager and search System.data.entity....install it....put reference of using System.ComponentModel.DataAnnotations;

The type or namespace name 'Core' does not exist in the namespace

I encounter this kind of error when I debug a project I already have ...EntityFramework.dll..., ...System.Core.dll..., ...System.Data.Entity... but still ...Core... is not referenced. ...Can someone help me?...I'm having error in this Line ...using System.Data.Entity.Core.Objects; ...This is the error:...The type or namespace name 'Core' does not ...

The type or namespace name 'SignInManager' could not be found (are you missing a using directive or an assembly reference?)

I've been following the steps given in this website: ...http://www.asp.net/web-forms/overview/getting-started/getting-started-with-aspnet-45-web-forms/checkout-and-payment-with-paypal.... I am already on the "Modifying Login Functionality". There seems to be a problem in the SignInManager.When I hover the pointer, it appears "...The type or namespa...

MVC5 Multiple types were found that match the controller named 'Home'

I had the same issue and found that the older version had created compiled files in the "bin" folder. ...Once I deleted these the error disappeared.