New Feature Proposal

Description

Right now we can take a document (or node) and write it somewhere using .ToHtml(). What I'd like to do is avoid copying the document to something altogether and pull from the document structure instead. I.e. something like .ReadAsStream(). Then I'll be able to pass around my IHtmlDocument once I've gone to the trouble of parsing it and avoid the allocations and extra work of serializing it back to a string.

Maybe I'm missing how this can be done out of the box? Or perhaps you've got some pointers if I take this on?