.NET Client library for the Dropbox API
http://dkdevelopment.net/what-im-doing/dropnet/
Example usage:
var dropNetclient = new DropNetClient("API_KEY", "API_SECRET");
//call the functions you want from the client
dropNetclient.Login("test@example.com", "password");
var rootDetails = dropNetclient.GetMetaData();
//rootDetails.Contents is a list of the files/folders in the root