NOTE: This API is now obsolete.
Supplies a hash code for an object, using a custom hash function.
(in mscorlib.dll)
Visual Basic (Declaration)
<ObsoleteAttribute("Please use IEqualityComparer instead.")> _
<ComVisibleAttribute(True)> _
Public Interface IHashCodeProvider
Dim instance As IHashCodeProvider
[ObsoleteAttribute("Please use IEqualityComparer instead.")]
[ComVisibleAttribute(true)]
public interface IHashCodeProvider
[ObsoleteAttribute(L"Please use IEqualityComparer instead.")]
[ComVisibleAttribute(true)]
public interface class IHashCodeProvider
public interface IHashCodeProvider
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 7, Windows Vista, Windows XP SP2, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP Starter Edition, Windows Server 2008 R2, Windows Server 2008, Windows Server 2003, Windows Server 2000 SP4, Windows Millennium Edition, Windows 98, Windows CE, Windows Mobile for Smartphone, Windows Mobile for Pocket PC, Xbox 360, Zune
The .NET Framework and .NET Compact Framework do not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.
.NET Framework
Supported in: 1.1, 1.0
Obsolete (compiler warning) in 3.5
Obsolete (compiler warning) in 3.5 SP1
Obsolete (compiler warning) in 3.0
Obsolete (compiler warning) in 3.0 SP1
Obsolete (compiler warning) in 3.0 SP2
Obsolete (compiler warning) in 2.0
Obsolete (compiler warning) in 2.0 SP1
Obsolete (compiler warning) in 2.0 SP2
.NET Compact Framework
Supported in: 1.0
Obsolete (compiler warning) in 3.5
Obsolete (compiler warning) in 2.0
XNA Framework
Obsolete (compiler warning) in 3.0
Obsolete (compiler warning) in 2.0
Obsolete (compiler warning) in 1.0
Reference
IHashCodeProvider