GetHashCode Method

2013-01-16

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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
)

int GetHashCode(
    Object^ obj
)

abstract GetHashCode : 
        obj:Object -> int

function GetHashCode(
    obj : Object
) : int

Parameters

obj
Type: System. . :: . .Object
The Object for which a hash code is to be returned.

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 null Nothing nullptr unit a 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.

.NET Framework Security

Full trust for the immediate caller. This member cannot be used by partially trusted code. For more information, see dd66cd4c-b087-415f-9c3e-94e3a1835f74.

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