Hello

I am trying to run this code but everytime i got this error

Code:
Public Sub Command1_Click()
Dim fr As System.Net.HttpWebRequest
    Dim targetURI As New Uri("http://whatever.you.want.to.get/file.html")
    fr = DirectCast(HttpWebRequest.Create(targetURI), System.Net.HttpWebRequest)
    If (fr.GetResponse().ContentLength > 0) Then
       Dim str As New System.IO.StreamReader(fr.GetResponse().GetResponseStream())
        Response.Write (str.ReadToEnd())
        str.Close();
    End If
MsgBox (targetURI)
End Sub
Error

Code:
user defined type not defined
Searched on Internet but didnt got the solution. What problem i am getting ?

Thanks