How to read a text file from a website

Imports System.Net
Public Class Form1

    Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
        Dim webclint As WebClient = New WebClient
        Dim dlstring As String = webclint.DownloadString(textbox1.text)
        TextBox2.Text = dlstring
    End Sub
End Class