C# in a Nutshell, Second Edition

Name

IComparer

Synopsis

This interface implements a method for comparing objects. Compare( ) determines whether an object is greater than (positive return value), less than (negative return value), or equal (zero) to another object. This interface is required for classes that need to sort elements or search collections.

public interface IComparer {
// Public Instance Methods
   public int Compare(object x, object y);
}

Implemented By

CaseInsensitiveComparer, Comparer

Returned By

Hashtable.comparer

Passed To

System.Array.{BinarySearch( ), Sort( )}, ArrayList.{BinarySearch( ), Sort( )}, Hashtable.{comparer, Hashtable( )}, SortedList.SortedList( ), System.Collections.Specialized.ListDictionary.ListDictionary( ), System.Collections.Specialized.NameObjectCollectionBase.NameObjectCollectionBase( ), System.Collections.Specialized.NameValueCollection.NameValueCollection( ), System.Xml.XPath.XPathExpression.AddSort( )