DBContext & DBSet not defined

and then I got this error...what is happening


Imports System Imports System.Data.Entity Imports System.Data.Entity.Infrastructure
Partial Public Class CustServEntities Inherits DbContext
Public Sub New() MyBase.New("name=CustServEntities") End Sub
Protected Overrides Sub OnModelCreating(modelBuilder As DbModelBuilder) Throw New UnintentionalCodeFirstException() End Sub
Public Property CS() As DbSet(Of C) Public Property CSAudits() As DbSet(Of CSAudit) Public Property EDIs() As DbSet(Of EDI) Public Property EDI_Audit() As DbSet(Of EDI_Audit) Public Property Emails() As DbSet(Of Email) Public Property EmailAudits() As DbSet(Of EmailAudit) Public Property Employees() As DbSet(Of Employee) Public Property Faxes() As DbSet(Of Fax) Public Property FaxAudits() As DbSet(Of FaxAudit) Public Property Libraries() As DbSet(Of Library) P ...