LINQ To Google Image and Google Groups

using System;
using System.Collections.Generic;
using System.Text;

using System.Linq;
using System.Linq.Expressions;

using MChen.Linq.GoogleSearch.Common;

namespace MChen.Linq.GoogleSearch.Images
{
    /// <summary>
    /// Represent the format of the image
    /// </summary>
    public enum ImageFormat {
        Any, JPG, PNG, GIF
    }

    /// <summary>
    /// The size of Image
    /// </summary>
    public enum ImageSize {
        Any, Large, Medium, Small
    }

    /// <summary>
    /// Color format of the image
    /// </summary>
    public enum ImageColor
    {
        Any, BlackWhite, Greyscale, Color
    }

    public class Image : Result
    {
        public ImageFormat Format { get; internal set; }
        public ImageSize Size { get; internal set; }
        public ImageColor Color { get; internal set; }

        public int Width { get; internal set; }
        public int Height { get; internal set; }

        public int FileSize { get; internal set; }

        public string ThumbnailURL { get; internal set; }
        public int ThumbnailWidth { get; internal set; }
        public int ThumbnailHeight { get; internal set; }

        public bool RelatesTo(string key)
        {
            throw new ApplicationException("This method is not intended to be called in your code.");
        }

        public override string ToString()
        {
            StringBuilder sb = new StringBuilder();
            sb.AppendFormat("{9} --> {0}\n\tUrl:            {1}\n\tSize:           " +
                            "{2} X {3}\n\tThumbnail:      {4}\n\tThumbnail Size: {5} X {6}\n\t" + 
                            "Format:         {7}\n\tDomain:         {8}", 
                Description,
                Url,
                Width,
                Height,
                ThumbnailURL,
                ThumbnailWidth,
                ThumbnailHeight,
                Format,
                Domain,
                Rank);
            return sb.ToString();
        }
    }
}