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IEqualityComparer.GetHashCode Method

Microsoft Silverlight will reach end of support after October 2021. Learn more.

Returns a hash code for the specified object.

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

Syntax

'Declaration
Function GetHashCode ( _
    obj As Object _
) As Integer

int GetHashCode(
    Object obj
)

Parameters

Return Value

Type: System.Int32
A hash code for the specified object.

Exceptions

Exception Condition
ArgumentNullException

The type of obj is a reference type and obj is nulla null reference (Nothing in Visual Basic).

Remarks

Implement this method to provide customized hash codes for objects,corresponding to the customized equality comparison provided by the Equals method.

Notes to Implementers

Implementations are required to ensure that if the Equals method returns true for two objects x and y, then the value returned by the GetHashCode method for x must equal the value returned for y.

Version Information

Silverlight

Supported in: 5, 4, 3

Silverlight for Windows Phone

Supported in: Windows Phone OS 7.1, Windows Phone OS 7.0

XNA Framework

Supported in: Xbox 360, Windows Phone OS 7.0

Platforms

For a list of the operating systems and browsers that are supported by Silverlight, see Supported Operating Systems and Browsers.