List files in one folder but got an error

[aspfun]

I use code below to list files in listbox1 but an item "~$0020419.doc" was listing there. I reboot pc but no luck. Why?

In C:\test\, there are only 3 files: 100020419.doc, 100025818.doc and demo.doc

Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
' make a reference to a directory
Dim di As New IO.DirectoryInfo("c:\test\")
Dim diar1 As IO.FileInfo() = di.GetFiles()
Dim dra As IO.FileInfo

'list the names of all files in the specified directory
For Each dra In diar1
ListBox1.Items.Add(dra)
Next
End Sub

[ident]

Hidden file?

[bensonsearch]

its a temp file for when you open an office file which is normally hidden, to see it in explorer you need to adjust your view options to show hidden objects