I need to take a collection and group it via Linq but all the examples I've seen fail in some manner or other with some syntax difference that I can't quite lick.

My collection:

Dim a As New List(Of ProcessAlert)
  a.Add(New ProcessAlert("0000112367", "[email protected]", "Alert", 2))
  a.Add(New ProcessAlert("0000112367", "[email protected]", "Document", 2))
  a.Add(New ProcessAlert("0000112367", "[email protected]", "Note", 2))
  a.Add(New ProcessAlert("0000112367", "[email protected]", "Alert", 1))
  a.Add(New ProcessAlert("0000112367", "[email protected]", "Document", 1))
  a.Add(New ProcessAlert("0000112367", "[email protected]", "Note", 1))
Return a

I need to turn this collection into a simple way to give this final outcome:

"[email protected]", "Alert, Document, Note"
"[email protected]", "Alert, Document, Note"

Here's the definition of the ProcessAlert class:

Public Class ProcessAlert
  Public LoanNumber As String
  Public EmailAddress As String
  Public AlertType As String
  Public AlertMethodID As Byte
End Class

Thanks in advance,

CD