Uploading files from one site to another

I have 2 asp.net sites (site1 and site2). site1 have a directory inside in called images. In images directory there are images. I need to upload file开发者_如何学Pythons using site2 aspx page, but need to upload them to images folder of site1. how can I do that?

If you cannot write directly to the folder or the sites are on different servers then best option is to upload the file to site 1 then use WebClient object to upload file to site 2. More details on how to use web-request to upload and download files can be found here.