LINQ to Entity Error

It didn't work I get error on the Context line 'Ems_KeyVot' is not a member of System.Web.HttpContext.

Also, I don't understand why I should create a Votes class? all the properties in the votes class you suggest are existing properties in the other 2 entities/tables KeyVot & Vot. 

let me show the case in more details:

I have the following 3 entity Contains:

Public Class Ems_Vot

 

  Public Property VotID() As Integer              ' act as primery key

  Public Property FullName() As String

  ' Many other properties

End Class

Then 2nd Entity is:

Public Class Ems_Key

 

  Public Property KeyID() As Integer

  Public Property KeyName() As String

  ' Many other properties

End Class

Then 3rd Entity is: this entity has a relationship with Ems_Key & Ems_Vot

Public Class Ems_KeyVot

  ' this entity should hold all the Vot persons who this Key person responsiple for

 

  Public Property KeyVotID() As Integer              ' act as primery key

  

  Public Property KeyID() As Integer

  Public Overridable Property Keys() As Ems_Key     ' defining the relationship to Ems_Key

  

  Public Property VotID() As Integer

  Public Overridable Property Vot() As Ems_Vot     ' defining the relationship to Ems_Vot

  ' Many other properties

End Class

So in one aspx page it lists the Vot persons who are in KeyVot entity by 

runing a query which should link (join) Ems_KeyVot & Ems_Vot entities & get

the Vot person ID & FullName

1- I need to build that query

2- Also I am wondering, since the relationship already defined should I still need to use the join in

the query?

Thanks