Well, I stand corrected.... Find is faster then using Enumeration, even when
you have to go through the contortions that Tom suggested.  The results for
the test code that follows were:

Starting test.....
Elasped time for Enumeration is 00:00:13.0926257
Elasped time for Find is 00:00:12.4814362

and the test I used....

Module Module1
   Dim Products As New List(Of Product)
   Dim TestCount As Integer = 10000

   Sub Main()
       Dim I As Integer
       For I = 1 To TestCount
           Dim p As New Product(I)
           Products.Add(p)
       Next
       Dim sw As New System.Diagnostics.Stopwatch
       Console.WriteLine("Starting test.....")
       sw.Start()
       For I = 1 To TestCount
           FindProduct(I.ToString)
       Next
       sw.Stop()
       Console.WriteLine("Elasped time for Enumeration is {0}", sw.Elapsed)
       sw.Reset()
       sw.Start()
       For I = 1 To TestCount
           FindProduct2(I.ToString)
       Next
       sw.Stop()
       Console.WriteLine("Elasped time for Find is {0}", sw.Elapsed)
       Console.ReadLine()
   End Sub

   Private Function FindProduct(ByVal code As String) As Product
       For Each p As Product In Products
           If p.Code = code Then Return p
       Next
       Return Nothing
   End Function

   Function FindProduct2(ByVal code As String) As Product
       Dim pred As New PredicateClass(code)

       Return products.Find(AddressOf pred.PredicateFunction)
   End Function

   Public Class Product
       Private _Code As String
       Public ReadOnly Property Code() As String
           Get
               Return _Code
           End Get
       End Property

       Public Sub New(ByVal c As Integer)
           _Code = c.ToString
       End Sub
   End Class

   Private Class PredicateClass
       Private code As String
       Public Sub New(ByVal code As String)
           Me.code = code
       End Sub

       Public Function PredicateFunction(ByVal bo As Product) As Boolean
           Return bo.Code = Me.code
       End Function
   End Class

End Module