see on GitHub

Attachments : Put

PutAttachment is used to insert or update an attachment in a database.

Syntax

void PutAttachment(string key, Etag etag, Stream data, RavenJObject metadata);

Parameters
key string unique key under which attachment will be stored
etag Etag current attachment etag, used for concurrency checks (null to skip check)
data Stream attachment data
metadata RavenJObject attachment metadata

Example

using (var file = File.Open("sea.png", FileMode.Open))
{
	store
		.DatabaseCommands
		.PutAttachment("albums/holidays/sea.jpg", null, file, new RavenJObject
			                                           {
				                                           { "Description", "Holidays 2014" }
			                                           });
}