static void Main(string[] args)
{
    Ipernity ipernity = new Ipernity("apiKey", "apiSecret");
    ipernity.AlwaysSign = true;
    //Create a new document and configure it
    Document document = new Document(123456);
    ipernity.ConfigureIpernityObject(document);
    try
    {
        // get notes from the document
        document.Get(new ExtraInformation[] {ExtraInformation.Note});
        if(document.Notes.Count > 0)
        {
            // get the first note
            Note note = document.Notes.First().Value);
            // edit the note
            note.Edit("New content", 50, 50, 100, 150);
            // delete the note
            note.Delete();
        }
    }                
    catch (IpernityException ex) 
    {
        Console.WriteLine("Ipernity returned an error : {0}", ex.Message);
    }
}