Visual Basic

Public Class myclass
....
Private cont As MyentEntities
.....
.....

Public Sub New( ByRef cnx As MyentEntities)
   .....
    cont = cnx
    .....
End Sub

Public Sub test
.....

If cont.mytable1.Count=1 then

.....
end if 

End Sub
End class

.......
Dim E1 as MyEntEntities
Dim m1 as myclass
Private Sub MainForm_Load(sender As System.Object, e As System.EventArgs)    
Handles Me.Load 

E1=New MyentEntities
m1=new MyClass(E1)
........

End Sub

Private sub fill_entity

E1.MyTable1.Tolist
....
End sub

Private Sub Button1_Click(sender As System.Object, e As System.EventArgs)    
Handles Button1.Click

m1.test

End Sub