CODEWITHSUNDEEP
c#linq
GibboK
GibboK

Reputation: 73918

Cannot find using System.Data.Linq

I'm using C#, EF 4 in asp.net 4 and VS 2010.

I'm trying to load namespace System.Data.Linq with this code using System.Data.Linq and I receive this error:

Error 2 The type or namespace name 'Linq' does not exist in the namespace 'System.Data' (are you missing an assembly reference?)

Any idea what I'm doing wrong.

Upvotes: 28

Views: 53624

Answers (6)

Семен Курсаков
Семен Курсаков

Reputation: 1

For VS 2022 and project on .NET 6.0 --- Project \ Referencies \ search \ MindBox.Data.Linq, everywhere "OK", install (based on personnel expirience)

Also, may be, need install -- Referencies \MS.System.Linq.Queryable (or MS.Queryable, not remember)

After all action LinqToSQL will be work in project.

Upvotes: -1

SystemStack
SystemStack

Reputation: 43

VS Installer

VS Installer

The above answers didn't work for me, my problem was that I needed to add LINQ to SQL tools in Visual Studio.

Upvotes: 3

M. Wiśnicki
M. Wiśnicki

Reputation: 6203

Try re-change target framework for your project.

Go to Proporties > Application > Target Framework change to another than used now, and next change it back.

Upvotes: 4

Steve Woods
Steve Woods

Reputation: 608

Just to confirm that Adding the reference to the project didn't work for me because it was already selected.

However, selecting "Copy Local, True" in the Properties pane for the reference made it start working.

Upvotes: 11

Marc Gravell
Marc Gravell

Reputation: 1062780

That namespace is LINQ-to-SQL, so you'll also need to add a reference to System.Data.Linq.dll; it won't be added by default just by adding Entity Framework.

Upvotes: 5

Jesus Ramos
Jesus Ramos

Reputation: 23268

Right click your solution/project. Click Add Reference and search for System.Data.Linq and add the reference there and it should compile.

Upvotes: 45

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