ReferenceEquals Method

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Determines whether the specified Object instances are the same instance.

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

Syntax

'Declaration
Public Shared Function ReferenceEquals ( _
    objA As Object, _
    objB As Object _
) As Boolean

public static bool ReferenceEquals(
    Object objA,
    Object objB
)

public:
static bool ReferenceEquals(
    Object^ objA, 
    Object^ objB
)

static member ReferenceEquals : 
        objA:Object * 
        objB:Object -> bool 

public static function ReferenceEquals(
    objA : Object, 
    objB : Object
) : boolean

Parameters

• objA
  Type: System. . :: . .Object
  The first object to compare.

• objB
  Type: System. . :: . .Object
  The second object to compare.

Return Value

Type: System. . :: . .Boolean
true if objA is the same instance as objB or if both are null; otherwise, false.

Remarks

Unlike the Equals method and the equality operator, the ReferenceEquals method cannot be overridden. Because of this, if you want to test two object references for equality and are unsure about the implementation of the Equals method, you can call the ReferenceEquals method. However, note that if objA and objB are value types, they are boxed before they are passed to the ReferenceEquals method.

.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.

See Also

Reference

Object Class

System Namespace