VB - LDAP - Liefert eine Liste mit allen Gruppen zu einem User

Imports System.DirectoryServices
Imports System.DirectoryServices.ActiveDirectory


    Public Function GetUserMemberOf(ByVal domain As String, ByVal username As String, ByVal password As String, Optional ByRef exeption As Exception = Nothing) As Collections.Generic.List(Of String)
        Dim searcher As DirectorySearcher = Nothing
        Dim colEntry As New Collections.Generic.List(Of String)

        Try
            searcher = New DirectorySearcher(New DirectoryEntry("LDAP://" & domain, username, password))
            searcher.Filter = String.Concat("(&(objectClass=User) (sAMAccountName=", username, "))")
            searcher.PropertiesToLoad.Add("MemberOf")

            Dim result As SearchResult = searcher.FindOne
            For i As Integer = 0 To result.Properties("MemberOf").Count - 1
                Dim sProp As String = result.Properties("MemberOf")(i)
                colEntry.Add(sProp.Substring(3, sProp.IndexOf(",") - 3))
            Next

        Catch ex As Exception
            exeption = ex

        Finally
            searcher.Dispose()
        End Try

        Return colEntry

    End Function