DownloadFile – Downloading and saving the file at the specified URI

' Downloads the file at the specified URI, and saves it where specifiedSub DownloadFile(ByVal uri As String, ByVal destFile As String, _    Optional ByVal username As String = Nothing, Optional ByVal pwd As String = _    Nothing)    Dim wc As New System.Net.WebClient()    If Not username Is Nothing AndAlso Not pwd Is Nothing Then        wc.Credentials = New System.Net.NetworkCredential(username, pwd)    End If    wc.DownloadFile(uri, destFile)End Sub