Csharp/C Sharp/Class Interface/IComparer

Implement IComparer

<source lang="csharp"> using System; using System.Collections; class Album : IComparable, ICloneable {

   private string _Title;
   private string _Artist;
   public Album(string artist, string title) {
       _Artist = artist;
       _Title = title;
   }
   public string Title {
       get {
           return _Title;
       }
       set {
           _Title = value;
       }
   }
   public string Artist {
       get {
           return _Artist;
       }
       set {
           _Artist = value;
       }
   }
   public override string ToString() {
       return _Artist + ",\t" + _Title;
   }
   public int CompareTo(object o) {
       Album other = o as Album;
       if (other == null)
           throw new ArgumentException();
       if (_Artist != other._Artist)
           return _Artist.rupareTo(other._Artist);
       else
           return _Title.rupareTo(other._Title);
   }
   public object Clone() {
       return new Album(_Artist, _Title);
   }

} class TitleComparer : IComparer {

   public int Compare(object l, object r) {
       Album left = l as Album;
       Album right = r as Album;
       if ((left == null) || (right == null))
           throw new ArgumentException();
       if (left.Title != right.Title)
           return left.Title.rupareTo(right.Title);
       else
           return left.Artist.rupareTo(right.Artist);
   }

} class Class1 {

   static void Main(string[] args) {
       ArrayList arr = new ArrayList();
       arr.Add(new Album("G", "A"));
       arr.Add(new Album("B", "G"));
       arr.Add(new Album("S", "A"));
       arr.Sort();
  
       try {
           foreach (Album a in arr) {
               Console.WriteLine(a);
           }
       } catch (System.InvalidCastException e) {
       }
       arr.Sort(new TitleComparer());
       foreach (Album a in arr) {
           Console.WriteLine(a);
       }
       Album l = new Album("L", "G");
       arr.Sort();
       int index = arr.BinarySearch(l);
       Console.WriteLine(index.ToString());
       arr.Sort(new TitleComparer());
       index = arr.BinarySearch(l, new TitleComparer());
       Console.WriteLine(index.ToString());
   }

}

</source>