请问这段vb代码在.net中怎么实现?Function GetURL(url)
Set Retrieval = Server.CreateObject("Microsoft.XMLHTTP")
With Retrieval
.Open "GET", url, false
.setRequestHeader "Content-Type","application/x-www-form-urlencoded"
.Send
GetURL = .ResponseBody
End With
Set Retrieval = Nothing
GetURL=bstr(GetURL)
End Function