Utilisation avec timeout de 10 secondes
DownloadFile("http://www.toto.com/fichier.zip","c:\fichier.zip,10000)

Public Sub DownloadFile(ByVal RemoteFilePath As String, ByVal SaveFilePath As String, ByVal TimeOut As Integer, Optional ByVal BlockSize As Integer = 1024)Dim wr As WebRequest = WebRequest.Create(RemoteFilePath) 
wr.Timeout = TimeOut

Dim wresp As WebResponse = wr.GetResponse()
Dim RemoteStream As Stream = wresp.GetResponseStream() 
Dim LocalStream As New FileStream(SaveFilePath, FileMode.OpenOrCreate, FileAccess.Write, FileShare.Read)
Dim LocalStreamW As New BinaryWriter(LocalStream) 
Dim buff As Byte() = New Byte(BlockSize - 1) {}
Dim iBytesRead As Integer = 1While iBytesRead > 0 
iBytesRead = RemoteStream.Read(buff, 0, buff.Length)

LocalStreamW.Write(buff, 0, iBytesRead)

End While

wresp.Close()

RemoteStream.Close()

RemoteStream.Dispose()

LocalStreamW.Close()

LocalStream.Close()

LocalStream.Dispose()

End Sub

My.Computer.Network.DownloadFile(New Uri("http://www.toto.com/fichier.zip"), "c:\fichier.zip", "", "", False, 10000)

DownLoadFile(VarGlobal.MonoHttpTarGz,VarGlobal.MonoTarGz,10000,1024);
         /// <summary>
        /// 
        /// </summary>
        /// <param name="Srce">
        /// A <see cref="System.String"/>
        /// </param>
        /// <param name="Dest">
        /// A <see cref="System.String"/>
        /// </param>
        /// <param name="TimeOut">
        /// A <see cref="System.Int32"/>
        /// </param>
        /// <param name="BlockSize">
        /// A <see cref="System.Int32"/>
        /// </param>
        int ProgressDll = 0;
        private void DownLoadFile(string Srce, string Dest,int TimeOut,int BlockSize)
        {
            System.Net.WebRequest request = System.Net.WebRequest.Create(Srce);
            request.Timeout = TimeOut; 
            System.Net.WebResponse response = request.GetResponse(); 
            System.IO.Stream responseStream = response.GetResponseStream();
            
            FileStream LocalStream = new FileStream(Dest, FileMode.OpenOrCreate, FileAccess.Write, FileShare.Read);
            BinaryWriter LocalStreamW = new BinaryWriter(LocalStream); 
            byte[] buff = new byte[BlockSize - 1];
            int iBytesRead  = 1;
            
            while (iBytesRead > 0 )
            {
                iBytesRead = responseStream.Read(buff, 0, buff.Length);
                LocalStreamW.Write(buff, 0, iBytesRead);
                ProgressDll +=1;
                Console.WriteLine(ProgressDll);
            }
            response.Close();
            responseStream.Close();
            responseStream.Dispose();
            LocalStreamW.Close();
            LocalStream.Close();
            LocalStream.Dispose();                    
        }
         
    }