Live images, files save in c sharp

 <form id="form1" runat="server">
    <div>
        <asp:TextBox ID="TextBox1" runat="server"></asp:TextBox>
        <asp:Button ID="Button1" runat="server" Text="Button" onclick="Button1_Click" />
    </div>
    </form>


protected void Button1_Click(object sender, EventArgs e)
    {
        HttpWebRequest request = (HttpWebRequest)WebRequest.Create(TextBox1.Text.Trim());
        string filname = TextBox1.Text.Trim();
        filname = string.Format("{0:MMMMyyyyHHmmssFFFF}", DateTime.Now) + filname.Substring(filname.LastIndexOf("/") + 1);

        HttpWebResponse response = (HttpWebResponse)request.GetResponse();
        if ((response.StatusCode == HttpStatusCode.OK ||
                   response.StatusCode == HttpStatusCode.Moved ||
                   response.StatusCode == HttpStatusCode.Redirect) &&
                   response.ContentType.StartsWith("image", StringComparison.OrdinalIgnoreCase))
        {
            using (Stream inputStream = response.GetResponseStream())
            using (Stream outputStream = File.Create(Server.MapPath("images") + "\\" + filname + ""))
            {
                byte[] buffer = new byte[4096];
                int bytesRead;
                do
                {
                    bytesRead = inputStream.Read(buffer, 0, buffer.Length);
                    outputStream.Write(buffer, 0, bytesRead);
                } while (bytesRead != 0);
            }
        }
    }