Saving HTML

i used the following code to save an html from webbrowser

File::WriteAllText(saveFileDialog1->FileName,webb->Document->Body->Parent->OuterHtml,Encoding::GetEncoding(webb->Document->Encoding));

but the saved html file didn't contain any of the images.

I tried using WriteAllBytes instead of WriteAllText but i didn't know how to use it.

Someone please help.