The type 'System.Data.Entity.DbContext' is defined

sourabh choubey

10y10.9k.NET

The type 'System.Data.Entity.DbContext' is defined in an assembly that is not referenced. You must add a reference to assembly 'EntityFramework, Version=5.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089'.why this prob occur several time

7 Replies

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Rajeev Punhani10y ago
Accepted answer
Hi Sourabh,
Please see the below link.
http://www.howtosolutions.net/2012/08/solving-compiler-error-cs0012-system-data-entity-dbcontext-using-entity-framework/
Rajeev Punhani10y ago
Hi Sourabh,
You need the EntityFramework.dll reference (and not System.Data.Entity).If you are missing the reference of Entity Framework manually add it.
Ravi Patel10y ago
Hi,
you need to install entityFramework in your project
you can install it from package manager console or nuget
From the Tools menu, select Library Package Manager and then click Package Manager Console.
type the following command in Package Manager Console.
Install-Package EntityFramework
for more details check this
http://www.c-sharpcorner.com/UploadFile/858292/addupdatedelete-package-and-library-from-nuget-package/
https://docs.nuget.org/consume/package-manager-console
sourabh choubey10y ago
friends i have already entity framework installed and i have already taken reference of system.data.entity.Still there is a problem....what to do
kalu singh rao10y ago
EntityFramework is install by Nuget Manager. It have all latest dll.
ketan borsdiya10y ago
Hi sourabh,
You need to add System.Data.Entity in reference.
For add reference,
Right Click on References-> Add Reference.
Search above namespace in Framwork pane
Vignesh Mani10y ago
Hi Friend you need to install entity frame work or add entity frame work in Visual Studio.
Please find below link
https://msdn.microsoft.com/en-gb/data/ee712906.aspx