How to skip Directory or file when UnauthorizedAccessException occurs

Question

Code is below. I am trying to fetch files from a specific path as sDirPath and then store in a tree view, basically making a custom folder browser dialog box. But the issue is, when I get system files or folders which are inaccessible, I get UnauthorizedAccessException. It occurs on folders or files like hidden and system folders or files e.g $recyle.bin in C:\ or shortcut of Documents and Settings. I just want to skip these folders or files. I don't want to fetch them.

Dim sAllfiles() As String = Directory.GetFiles(sDirPath, "*.*")
For Each sfile As String In sAllfiles          
    Dim objFileInformation As FileInfo = New FileInfo(sfile)
    Dim tnTreeNodeSub As TreeNode
    tnTreeNodeSub=tnTreeNodeRootDirectory.Nodes.Add(objFileInformation.Name)
Next    

Answer 1

Try .. Catch statements are for exactly this.

For example, this will only ignore an UnauthorizedAccessException. Any other exception will still kill the loop.

Dim sAllfiles() As String = Directory.GetFiles(sDirPath, "*.*")
For Each sfile As String In sAllfiles
    Try
        Dim objFileInformation As FileInfo = New FileInfo(sfile)
        Dim tnTreeNodeSub As TreeNode
        tnTreeNodeSub=tnTreeNodeRootDirectory.Nodes.Add(objFileInformation.Name)
    Catch ex As UnauthorizedAccessException
        Continue For 'Ignore the exception and move on
    End Try
Next

Answer 2

Modification to Gabriel Luci's answer:

Try
    Dim sAllfiles() As String = Directory.GetFiles(sDirPath, "*.*")
    For Each sfile As String In sAllfiles
        Try
            Dim objFileInformation As FileInfo = New FileInfo(sfile)
            Dim tnTreeNodeSub As TreeNode
            tnTreeNodeSub=tnTreeNodeRootDirectory.Nodes.Add(objFileInformation.Name)
        Catch ex As UnauthorizedAccessException
            Continue For 'Ignore the exception and move on
        End Try
    Next
Catch ex As UnauthorizedAccessException
    'Ignore the exception and move on
End Try

As this doing like this and adding one more catch will help if you give inaccessible path in sDirPath directly if you dont add it will close you application.