Detach is not found in ef

Question

I am following a video on MVVM.

There I have written a simple method by following the steps in video as follows :

[OperationContract]
public IEnumerable<Patient> GetPatients()
{
    using (Lab_Lite_Entities db = new Lab_Lite_Entities())
    {
        var result = db.Patients.ToList();
        result.ForEach(p => db.Detach(p)); //I get an error here.
        return result;
    }
}

But I get an error as follows:

Lab_Lite_Data.Lab_Lite_Entities does not contain a definition for 'Detach' and no
extension method 'Detach' accepting a first argument of type
'Lab_Lite_Data.Lab_Lite_Entities' could be found 
(are you missing a using directive or an assembly reference?)

I have added a reference to System.Data.Entity and EntityFramework.

I am using Entity Framework 6.0.

take a look to this question: http://stackoverflow.com/questions/4168073/entity-framework-code-first-no-detach-method-on-dbcontext — Selman Genç, Dec 25 '13 at 19:47
@Selman22 Thank you. It works perfectly. Please post the above link as answer. — Khushi, Dec 25 '13 at 19:50
If the correct answer to the question is to link to another question here on Stack Overflow, it should be closed as a duplicate. — Lasse V. Karlsen, Dec 25 '13 at 20:08

score 1 · Accepted Answer · edited May 23 '17 at 11:50

1

As the error shows DbContext doesn't contain Detach method but there is an alternative way

Entity Framework Code First - No Detach() method on DbContext

edited May 23 '17 at 11:50

Community

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answered Dec 25 '13 at 19:52

Selman Genç

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Detach is not found in ef

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