How to upload multiple files in ASP.NET ?

 Upload files<br />

         <asp:FileUpload ID="FileUpload1" runat="server" /><br /> 

         <asp:FileUpload ID="FileUpload2" runat="server" /><br /> 

         <asp:FileUpload ID="FileUpload3" runat="server" /><br />

          <asp:FileUpload ID="FileUpload4" runat="server" /><br />  

<p><asp:Button ID="btnUpload" runat="server" Text="Upload Multiple Files" OnClick="UploadMultipleFiles" /></p> 

protected void   UploadMultipleFiles(object sender, EventArgs e)

     {  

       HttpFileCollection files = Request.Files;

         for (int i = 0; i < files.Count; i++)

         {

             HttpPostedFile file = files[i];  

         

           string path = Server.MapPath("~/"); 

               string fileName = file.FileName;  

           file.SaveAs(path + fileName); 

            Response.Write(fileName + " uploaded successfully ! <br />"); 

        } 

    }