The following example gets the header collection from the My.Request object and uses the My.Response object to write it to the ASP.NET page.
<script runat="server">
Public Sub ShowHeaders()
' Load the header collection from the Request object.
Dim coll As System.Collections.Specialized.NameValueCollection
coll = My.Request.Headers
' Put the names of all keys into a string array.
For Each key As String In coll.AllKeys
My.Response.Write("Key: " & key & "<br>")
' Get all values under this key.
For Each value As String In coll.GetValues(key)
My.Response.Write("Value: " & _
Server.HtmlEncode(value) & "<br>")
Next
Next
End Sub
</script>