Was unable to turn lazy loading off in VB in EF6 - vb.net

Question

VS2013, code first EF6, VB
Elsewhere on SO I found a post that led me to add this to my Context class:
Public Sub New()
Me.Configuration.LazyLoadingEnabled = False
End Sub
However, in order to load a secondary table into my context for a view to find data to list in a For Each loop I had to add:
Dim myQuery = db.Questions.Include("PossibleAnswers").Where(Function(x) x.QuestionID = 6).Single()
Without that query in one form or another, my view does not find any data in the property 'PossibleAnswers' and nothing is displayed during the For Each loop. But with the query above, the For Each finds the PossibleAnswers data.
I checked the value of
db.Configuration.LazyLoadingEnabled
just before my view was called and it was false. But I still had to make a query with the Include() method to force the data to be brought into the context.
This is the full definition of the table in question:
Public Class Question
Public Enum qType
TrueFalse
MultipleChoice
ShortAnswer
End Enum
Public Property QuestionID As Integer
Public Property Text As String
Public Property Type As qType
Public Property PossibleAnswers As New List(Of qAnswer)
Public Property UsedBySurveys As New List(Of qSurvey)
End Class
Can anybody suggest what I may not be understanding about this?
Thanks.
Best Regards,
Alan

Answer 1

If you want all results from your context to automatically load the navigation properties, you should remove the Me.Configuration.LazyLoadingEnabled = False line from your context class.
You can also explicitly set lazy loading to false for an instance of your context: ie.
Using db As New MyContext
db.Configuration.LazyLoadingEnabled = True
Dim myQuery = db.Questions.Where(Function(x) x.QuestionID = 6).Single()
End Using
With Lazy Loading set to false, you have to explicitly tell the EF to include navigation properties along with the result set. You do that by using the .Include function (as you did). Calling the .Include function is called Eager Loading.
If you set the lazy loading property to true, the navigation properties will be pulled back from the database automatically. Here's a quick run down of Lazy Loading from MSDN:
http://msdn.microsoft.com/en-us/library/vstudio/dd456846(v=vs.100).aspx