Avoid system Volume information folder - vb.net

Question

I am using following code to get directory info. it works well if I search topleveldirectory.
But when i search alldirectories, it reaches system level information and throws error.
Is there any way to avoid searching system level information folder?
Thanks
Imports System.IO
Public Class Form1
Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
Dim di As New DirectoryInfo("d:\"), i As Integer
Dim aryFiles() As FileInfo = di.GetFiles("*.doc", SearchOption.TopDirectoryOnly)
For i = LBound(aryFiles) To UBound(aryFiles)
MsgBox(aryFiles(i).FullName)
Next i
End Sub
End Class

Answer 1

This code should do the trick for you.
Imports System.IO
Module Module1
Sub Main()
Dim folders = New DirectoryInfo("D:\").GetDirectories
Dim files = New List(Of FileInfo)
For Each folder In From d In folders Where d.Name <> "System Volume Information"
files.AddRange(folder.GetFiles("*.doc", SearchOption.TopDirectoryOnly))
Next
For Each File In files
MsgBox(File.FullName)
Next
End Sub
End Module
I'm assuming your project is .NET 3.5 or higher. Notify me if the assumption is wrong.
Edit
Since you requested for it, I hacked together code to automatically skip inaccessible folders. I did not test the code extensively so I cannot guarantee it will be bug-free.
Imports System.IO
Module Module1
Sub Main()
Dim folders = GetAllSubFolders("D:\Alex\Music")
Dim files = New List(Of FileInfo)
For Each folder In folders
files.AddRange(folder.GetFiles("*.doc", SearchOption.TopDirectoryOnly))
Next
For Each File In files
Console.WriteLine(File.FullName)
Next
Console.ReadLine()
End Sub
Function GetAllSubFolders(ByVal path As String) As IEnumerable(Of DirectoryInfo)
Dim subFolders As New List(Of DirectoryInfo)
Try
subFolders.AddRange(New DirectoryInfo(path).GetDirectories())
Catch ex As Exception
'error handling code goes here'
End Try
Dim innerSubFolders As New List(Of DirectoryInfo)
For Each folder In subFolders
innerSubFolders.AddRange(GetAllSubFolders(folder.FullName))
Next
'add the inner sub folders'
subFolders.AddRange(innerSubFolders)
'return the directories'
Return subFolders
End Function
End Module