With the increasing popularity of SharePoint 2010, and especially after the introduction of Office365, the market for client applications for SharePoint is increasing. In response, Microsoft has released the SharePoint Client Object Model, which is a wrapper library for the SharePoint web services.
In this post I will demonstrate how you can use the Client Object Model (dare we use the abbreviation COM?) to upload and download files to and from SharePoint. This may prove a central operation if you are migrating an existing SharePoint site to Office365. Other scenarios include uploading an existing file store to document libraries in a local SharePoint farm, or creating plug-in's to existing applications that need to process your documents.
