How to skip Directory or file when UnauthorizedAccessException occurs

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    

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