F؂Kvȃy[W_E[hF؂Kvȃy[Wi[U[ƃpX[hKvȃy[Wj
WebRequestAWebResponseNXgă_E[h@łB
WebRequest.CredentialsvpeBK؂ɐݒ肵܂B

̗ł͔F؂Kvȃy[W"http://www.yahoo.com"iۂɂ͂Kv܂j
[U["username"ApX[h"password"ƂāAy[W̓e擾Ă܂B
łHttpWebRequestAHttpWebResponseNXgp܂B

[VB.NET]
'HttpWebRequest̍쐬
Dim webreq As System.Net.HttpWebRequest = _
    CType(System.Net.WebRequest.Create("http://www.yahoo.com"), _
    System.Net.HttpWebRequest)

'F؂̐ݒ
webreq.Credentials = New System.Net.NetworkCredential("username", "password")

'HttpWebResponse̎擾
Dim webres As System.Net.HttpWebResponse = _
    CType(webreq.GetResponse(), System.Net.HttpWebResponse)

'Mĕ\
Dim st As System.IO.Stream = webres.GetResponseStream()
Dim sr As New System.IO.StreamReader(st)
Console.WriteLine(sr.ReadToEnd())
'
sr.Close()
st.Close()

[C#]
//HttpWebRequest̍쐬
System.Net.HttpWebRequest webreq =
    (System.Net.HttpWebRequest) System.Net.WebRequest.Create("http://www.yahoo.com");

//F؂̐ݒ
webreq.Credentials = new System.Net.NetworkCredential("username", "password");

//HttpWebResponse̎擾
System.Net.HttpWebResponse webres =
    (System.Net.HttpWebResponse) webreq.GetResponse();

//Mĕ\
System.IO.Stream st = webres.GetResponseStream();
System.IO.StreamReader sr = new System.IO.StreamReader(st);
Console.WriteLine(sr.ReadToEnd());
//
sr.Close();
st.Close();

