Temp Files Are Being Created In Website Directory

I am seeing temp files created in my wesite directory. The files are attributed to a page that I load from a txt file for more info. I beleive when I user clicks on the more info link and I read the textfile into the page it creates the temp file named somthing like this moreinfo.aspx~RF1630b1e.TMP does anyone know a way to clean these up other than a manual task? below is the code I use to read in the txt file

<script language="vb" runat="server">
Sub Page_Load(ByVal sender As Object, ByVal e As EventArgs)
Dim strURLNAme As String
Dim MyFileName As String
strURLNAme = Request.QueryString("AdultInfo")
' Response.Write(strURLNAme)
If strURLNAme = "adult" Then
MyFileName = "AdultMoreInfo.txt"
ElseIf strURLNAme = "kids" Then
MyFileName = "KidsMoreInfo.txt"
End If
'Open a file for reading
Dim FILENAME As String = Server.MapPath(MyFileName)
'read the file
Dim objStreamReader As StreamReader
objStreamReader = File.OpenText(FILENAME)
'read the entire file into a string
Dim contents As String = objStreamReader.ReadToEnd()
Me.lblNicerOutput.Attributes.CssStyle.Add("text-align", "Left")
'We may wish to replace carraige returns with <br>s
lblNicerOutput.Text = contents '.Replace(vbCrLf, "<br>")
objStreamReader.Close()
End Sub
</script>