System Namespace   Object Class

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Determines whether two Object instances are equal.

1. Determines whether the specified Object is equal to the current Object.

Determines whether the specified Object instances are considered equal.

[ C#, JScript ] The following code example compares different objects.

[ C#, JScript ] Note   This example shows how to use one of the overloaded versions of Equals. For other examples that might be available, see the individual overload topics.

[ C# ]
using System;

public class MyClass {
   public static void Main ( ) {
   string s1 = "Tom";
   string s2 = "Carol";
   Response.Write ( "Object.Equals ( \"{0}\", \"{1}\" ) => {2}",
      s1, s2, Object.Equals ( s1, s2 ) );

   s1 = "Tom";
   s2 = "Tom";
   Response.Write ( "Object.Equals ( \"{0}\", \"{1}\" ) => {2}",
      s1, s2, Object.Equals ( s1, s2 ) );

   s1 = null;
   s2 = "Tom";
   Response.Write ( "Object.Equals ( null, \"{1}\" ) => {2}",
       s1, s2, Object.Equals ( s1, s2 ) );

   s1 = "Carol";
   s2 = null;
   Response.Write ( "Object.Equals ( \"{0}\", null ) => {2}",
       s1, s2, Object.Equals ( s1, s2 ) );

   s1 = null;
   s2 = null;
   Response.Write ( "Object.Equals ( null, null ) => {2}",
       s1, s2, Object.Equals ( s1, s2 ) );
   }
}


/*

This code produces the following output.

Object.Equals ( "Tom", "Carol" ) => False
Object.Equals ( "Tom", "Tom" ) => True
Object.Equals ( null, "Tom" ) => False
Object.Equals ( "Carol", null ) => False
Object.Equals ( null, null ) => True

*/

[ JScript ]
import System

package Equals0
{

public class MyClass {
   public static function Main ( ) {
   var s1 : String = "Tom";
   var s2 : String = "Carol";
   var array : Object [ ] = new Object [ 3 ];

   array [ 0 ] = s1;
   array [ 1 ] = s2;
   array [ 2 ] = System.Object.Equals ( s1, s2 );

   Response.Write ( "Object.Equals ( '{0}', '{1}' ) => {2}",
      array );

   s1 = "Tom";
   s2 = "Tom";
   array [ 0 ] = s1;
   array [ 1 ] = s2;
   array [ 2 ] = System.Object.Equals ( s1, s2 );

   Response.Write ( "Object.Equals ( '{0}', '{1}' ) => {2}",
      array );

   s1 = null;
   s2 = "Tom";
   array [ 0 ] = s1;
   array [ 1 ] = s2;
   array [ 2 ] = System.Object.Equals ( s1, s2 );

   Response.Write ( "Object.Equals ( null, '{1}' ) => {2}",
       array );

   s1 = "Carol";
   s2 = null;
   array [ 0 ] = s1;
   array [ 1 ] = s2;
   array [ 2 ] = System.Object.Equals ( s1, s2 );

   Response.Write ( "Object.Equals ( '{0}', null ) => {2}",
       array );

   s1 = null;
   s2 = null;
   array [ 0 ] = s1;
   array [ 1 ] = s2;
   array [ 2 ] = System.Object.Equals ( s1, s2 );
   Response.Write ( "Object.Equals ( null, null ) => {2}",
       array );
   }
}

}

Equals0.MyClass.Main ( );


/*

This code produces the following output.

Object.Equals ( "Tom", "Carol" ) => False
Object.Equals ( "Tom", "Tom" ) => True
Object.Equals ( null, "Tom" ) => False
Object.Equals ( "Carol", null ) => False
Object.Equals ( null, null ) => True

*/

Object Members