The entity type is not part of the model for the current context - DBFirst - vb.net

Question

I have a query which selects a list of subrep. The query looks like this:
Public Async Function ReturnSubRepsAsync(user As BaseUser) As Task(Of IList(Of SubRep)) Implements IGeneralAccountManagementRepository.ReturnSubRepsAsync
'The entity type SubRep is not part of the model for the current context.
Using webDataDBContext As New WebDataEntities()
'So here it just has an SQL query which it will execute when requested
Dim subReps = webDataDBContext.Subreps.Where(Function(x) x.CID = user.CID)
If (String.IsNullOrEmpty(user.Password) = False) Then
'Add another where onto the SQL query
subReps = subReps.Where(Function(x) x.HASH_PASSWORD = user.PasswordHash)
End If
If (String.IsNullOrEmpty(user.Username) = False) Then
'Add another where onto the SQL query
subReps = subReps.Where(Function(x) x.username = user.Username)
End If
'Execute the query
Return Await subReps.ToListAsync()
End Using
End Function
Now due to entity framework database not including validation such as MaxLength on strings, I decided to follow this tutorial: https://learn.microsoft.com/en-us/aspnet/mvc/overview/getting-started/database-first-development/enhancing-data-validation
And add another partial public class which uses a MetaDataType to implement the validation. Now during debugging, I thought it was an issue with a column so I decided to comment out all of the code inside my separate partial class to test if it works, so I'm not left with an empty husk of a partial class. It has not made a difference, it still errors on the first where of my query.
My entity framework generated class looks like this:
Partial Public Class Subrep
Public Property id As Integer
Public Property CID As String
Public Property username As String
Public Property LastName As String
Public Property FirstName As String
Public Property MIddleInitial As String
Public Property Address As String
Public Property Address2 As String
Public Property City As String
Public Property State As String
Public Property Zip As String
Public Property HomePhone As String
Public Property EmailAddress As String
Public Property InActive As String
Public Property CellPhone As String
Public Property StartDate As String
Public Property AuditName As String
Public Property Background As String
Public Property FDCPA As String
Public Property Choicepoint As String
Public Property Badge As String
Public Property ConfAgree As String
Public Property NCCI_OK As String
Public Property InactiveRepNo As String
Public Property Approved As String
Public Property DateApproved As String
Public Property Denied As String
Public Property DateDenied As String
Public Property DeniedNotes As String
Public Property DOB As String
Public Property SSN As String
Public Property MegansLaw As String
Public Property MASTER As String
Public Property VACATION As String
Public Property FC_DEFAULT_FEE As Nullable(Of Decimal)
Public Property LM_DEFAULT_FEE As Nullable(Of Decimal)
Public Property MAS90 As String
Public Property SOS As String
Public Property HASH_PASSWORD As String
Public Property changepass As String
Public Property NOTIFICATION_OFF As String
Public Property Capacity As String
Public Property internalqc As String
Public Property New_Rep As String
Public Property Stand_By As String
Public Property Vacation_Start_date As Nullable(Of Date)
Public Property Vacation_End_date As Nullable(Of Date)
Public Property sub_coreIP As String
Public Property rating As String
Public Property date_last_updated As Nullable(Of Date)
End Class
And my separate partial class which is supposed to be used for validation looks like this:
Partial Public Class SubRep
End Class
So even though it's empty I get the error listed in the title. I have gotten this to work with multiple entities perfectly fine.

Answer 1

Just wow.
So with visual studio intellisense if you press F12 to try to find references it highlighted both partial classes Subrep and SubRep so that would lead you to believe that both were associated with one another. Turns out that because of the uppercase R in the second partial class SubRep, it's not associated with the model and therefore needs to match the case of the entity Subrep. Like this:
Partial Public Class Subrep
End Class
What's even weirder is that the Property in my DBContext uses an uppercase SubRep. Like this:
Public Overridable Property Subreps() As DbSet(Of SubRep)