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IHashCodeProvider Interface

NOTE: This interface is now obsolete.

Supplies a hash code for an object, using a custom hash function.

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

[ObsoleteAttribute("Please use IEqualityComparer instead.")] 
[ComVisibleAttribute(true)] 
public interface IHashCodeProvider
/** @attribute ObsoleteAttribute("Please use IEqualityComparer instead.") */ 
/** @attribute ComVisibleAttribute(true) */ 
public interface IHashCodeProvider
ObsoleteAttribute("Please use IEqualityComparer instead.") 
ComVisibleAttribute(true) 
public interface IHashCodeProvider
Not applicable.

The IHashCodeProvider interface is used in conjunction with the Hashtable class. The objects used as keys by a Hashtable object must override the Object.GetHashCode and Object.Equals methods. Object.GetHashCode or the key's implementation of Object.GetHashCode is used as the hash code provider. Object.Equals or the key's implementation of Object.Equals is used as the comparer.

However, some overloads of the Hashtable constructor take a parameter that is an IHashCodeProvider implementation, or a parameter that is an IComparer implementation, or both. If an IHashCodeProvider implementation is passed to the constructor, the IHashCodeProvider.GetHashCode method of that implementation is used as the hash code provider. If an IComparer implementation is passed to the constructor, the IComparer.Compare method of that implementation is used as the comparer.

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: 1.0, 1.1, 2.0
Obsolete (compiler warning) in 3.0

.NET Compact Framework

Supported in: 1.0
Obsolete (compiler warning) in 2.0

XNA Framework

Supported in: 1.0
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