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Comparer Generic Class

Provides a base class for implementations of the IComparer generic interface.

Namespace: System.Collections.Generic
Assembly: mscorlib (in mscorlib.dll)

[SerializableAttribute] 
public abstract class Comparer<T> : IComparer, IComparer<T>
J# supports the use of generic types and methods, but not the declaration of new ones.
JScript does not support generic types and methods.
Not applicable.

Type Parameters

T

The type of objects to compare.

Derive from this class to provide a custom implementation of the IComparer interface for use with collection classes such as the SortedList and SortedDictionary generic classes.

The object returned by the Default property uses the System.IComparable generic interface (IComparable<T> in C#, IComparable(Of T) in Visual Basic) to compare two objects. If type T does not implement the System.IComparable generic interface, the Default property returns a Comparer that uses the System.IComparable interface.

Notes to Implementers: Compare and EqualityComparer.Equals may behave differently in terms of culture-sensitivity and case-sensitivity. For string comparisons, the StringComparer class is recommended over Comparer<String>. Properties of the StringComparer class return predefined instances that perform string comparisons with different combinations of culture-sensitivity and case-sensitivity. The case-sensitivity and culture-sensitivity are consistent among the members of the same StringComparer instance. For more information on culture-specific comparisons, see the System.Globalization namespace and Encoding and Localization.

System.Object
  System.Collections.Generic.Comparer
Any public static (Shared in Visual Basic) members of this type are thread safe. Any instance members are not guaranteed to be thread safe.

Windows 98, Windows Server 2000 SP4, Windows CE, Windows Millennium Edition, Windows Mobile for Pocket PC, Windows Mobile for Smartphone, Windows Server 2003, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP SP2, Windows XP Starter Edition

The Microsoft .NET Framework 3.0 is supported on Windows Vista, Microsoft Windows XP SP2, and Windows Server 2003 SP1.

.NET Framework

Supported in: 3.0, 2.0

.NET Compact Framework

Supported in: 2.0

XNA Framework

Supported in: 1.0
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