System.Net.HttpListenerException - Access denied

I'm trying to develop an application which will be configured by a web interface, so to start I just want to create a simple application which will respond to a web request with a simple 'hello world'.

So to start with, Ive got the following:-
Imports System.Net

Public Class Form1

    Private Sub Form1_Load(sender As Object, e As EventArgs) Handles Me.Load
        If Not System.Net.HttpListener.IsSupported Then
            MsgBox("Windows XP SP2, Server 2003, or higher is required to use the HttpListener class.")
            Exit Sub
        End If

        Dim listener As System.Net.HttpListener = New System.Net.HttpListener()


        Dim response As HttpListenerResponse = Nothing
            Dim context As HttpListenerContext = listener.GetContext()

            response = context.Response
            Dim responseString As String = "<HTML><BODY>Hello</BODY></HTML>"
            Dim buffer() As Byte = System.Text.Encoding.UTF8.GetBytes(responseString)
            response.ContentLength64 = buffer.Length
            Dim output As System.IO.Stream = response.OutputStream
            output.Write(buffer, 0, buffer.Length)

        Catch ex As HttpListenerException
            If response IsNot Nothing Then
            End If
        End Try
    End Sub
End Class

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However, all Im getting when I try and run it is:-
An unhandled exception of type 'System.Net.HttpListenerException' occurred in System.dll
Additional information: Access is denied

I think its cause Im not running it as an administrator, however Ive configured the manifest to run as:-
<requestedExecutionLevel  level="requireAdministrator" uiAccess="false" />
without success.

Does anyone have any suggestions what I need to do to allow my application to run?

Thank you in advance
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Bob LearnedCommented:
My first thought would be that the port is in use.

When do you get the exception?
Have you tried right clicking and choosing "Run as Administrator"?
tonelm54Author Commented:
Cause I'm running it through Visual studio I cant run the debug session as administrator can I?

I have tried opening ports in a for loop between 1 and 99999 inside a for loop, and every port says denied
It seems to be a permissions issue. You can go to your project's bin folder and launch the application directly as administrator.

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Visual Basic.NET

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