Object.ReferenceEquals Method

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 nulla null reference (Nothing in Visual Basic); otherwise, false.

Public Class Example
   Public Shared Sub Demo(ByVal outputBlock As System.Windows.Controls.TextBlock)
    Dim o As Object = Nothing
    Dim p As Object = Nothing
    Dim q As New Object
    outputBlock.Text += Object.ReferenceEquals(o, p) & vbCrLf
    p = q
    outputBlock.Text += Object.ReferenceEquals(p, q) & vbCrLf
    outputBlock.Text += Object.ReferenceEquals(o, p) & vbCrLf
   End Sub
End Class
' This code produces the following output:
'
' True
' True
' False
'

using System;

class Example
{

   public static void Demo(System.Windows.Controls.TextBlock outputBlock)
   {
        object o = null;
        object p = null;
        object q = new Object();

        outputBlock.Text += Object.ReferenceEquals(o, p) + "\n";
        p = q;
        outputBlock.Text += Object.ReferenceEquals(p, q) + "\n";
        outputBlock.Text += Object.ReferenceEquals(o, p) + "\n";
   }
}


/*

This code produces the following output.

True
True
False

*/