gistfile1.txt

    private static readonly Guid PSETID_Note = new Guid("{0006200E-0000-0000-C000-000000000046}");
    Item note = new Item(service);
    note.ItemClass = "IPM.StickyNote";

    // 3. Set basic content
    note.Subject = "My EWS Sticky Note";
    note.Body = "This is the content of the sticky note.\nCreated via EWS Managed API.";

    // 4. Define Extended Properties (based on MS-OXONOTE spec)

    // PidNameNoteColor: 0=Blue, 1=Green, 2=Pink, 3=Yellow, 4=White
    ExtendedPropertyDefinition noteColor = new ExtendedPropertyDefinition(PSETID_Note, 0x8B00, MapiPropertyType.Integer);

    // Dimensions and Position (optional, but part of the spec)
    ExtendedPropertyDefinition noteWidth  = new ExtendedPropertyDefinition(PSETID_Note, 0x8B01, MapiPropertyType.Integer);
    ExtendedPropertyDefinition noteHeight = new ExtendedPropertyDefinition(PSETID_Note, 0x8B02, MapiPropertyType.Integer);
    ExtendedPropertyDefinition noteX      = new ExtendedPropertyDefinition(PSETID_Note, 0x8B03, MapiPropertyType.Integer);
    ExtendedPropertyDefinition noteY      = new ExtendedPropertyDefinition(PSETID_Note, 0x8B04, MapiPropertyType.Integer);

    // Set the property values
    note.SetExtendedProperty(noteColor,  3);   // Yellow
    note.SetExtendedProperty(noteWidth,  200);
    note.SetExtendedProperty(noteHeight, 150);
    note.SetExtendedProperty(noteX,      100);
    note.SetExtendedProperty(noteY,      100);

    // 5. Save the note to the default Notes folder
    note.Save(WellKnownFolderName.Notes);

    Console.WriteLine("Sticky Note created successfully!");