<asp:FileUpload ID="fuUpload" runat="server" CssClass="button" Width="400px" AllowMultiple="true" />
for (int i = 0; i < fuUpload.PostedFiles.Count; i++)
{
string filenames = fuUpload.PostedFiles[i].FileName;
string path = string.Format(CultureInfo.InvariantCulture, SiteStrings.NewObjectPath, _root, filenames);
fuUpload.SaveAs(path);
}