Imports System

Public Class Sample
    
    Sub Method()
        Dim Obj1 As New Object()
        Dim Obj2 As New Object()
        Console.WriteLine(Obj1.Equals(Obj2)) '===> false
        Obj2 = Obj1
        Console.WriteLine(Obj1.Equals(Obj2)) '===> true
    End Sub 'Method 
End Class 'Sample

using System;

public class Sample {
    void Method() {
    Object Obj1 = new Object();
    Object Obj2 = new Object();
    Console.WriteLine(Obj1.Equals(Obj2)); //===> false
    Obj2 = Obj1;
    Console.WriteLine(Obj1.Equals(Obj2)); //===> true
    }
}

#using <System.DLL>

using namespace System;
ref class Sample
{
private:
   void Method()
   {
      Object^ Obj1 = gcnew Object;
      Object^ Obj2 = gcnew Object;
      Console::WriteLine( Obj1->Equals( Obj2 ) ); //===> false
      Obj2 = Obj1;
      Console::WriteLine( Obj1->Equals( Obj2 ) ); //===> true
   }

};

import System.*;

public class Sample
{
    void Method()
    {
        Object obj1 = new Object();
        Object obj2 = new Object();
        Console.WriteLine(obj1.Equals(obj2)); //===> false
        obj2 = obj1;
        Console.WriteLine(obj1.Equals(obj2)); //===> true
    } //Method
} //Sample

using System;

class Point: Object {
   protected int x, y;

   public Point() {
     this.x = 0;
     this.y = 0;
   }

   public Point(int X, int Y) {
      this.x = X;
      this.y = Y;
   }
 
   public override bool Equals(Object obj) {
      //Check for null and compare run-time types.
      if (obj == null || GetType() != obj.GetType()) return false;
      Point p = (Point)obj;
      return (x == p.x) && (y == p.y);
   }

   public override int GetHashCode() {
      return x ^ y;
   }
}


class Point3D: Point {
   int z;

   public Point3D(int X, int Y, int Z) {
      this.x = X;
      this.y = Y;
      this.z = Z; 
   }

   public override bool Equals(Object obj) {
      return base.Equals(obj) && z == ((Point3D)obj).z;
   }

   public override int GetHashCode() {
      return base.GetHashCode() ^ z;
   }
}

using namespace System;
ref class Point: public Object
{
protected:
   int x;
   int y;

public:
   Point()
   {
      this->x = 0;
      this->y = 0;
   }

   Point( int X, int Y )
   {
      this->x = X;
      this->y = Y;
   }

   virtual bool Equals( Object^ obj ) override
   {
      
      //Check for null and compare run-time types.
      if ( obj == nullptr || GetType() != obj->GetType() )
            return false;

      Point ^ p = dynamic_cast<Point^>(obj);
      return (x == p->x) && (y == p->y);
   }

   virtual int GetHashCode() override
   {
      return x ^ y;
   }

};

ref class Point3D: public Point
{
private:
   int z;

public:
   Point3D( int X, int Y, int Z )
   {
      this->x = X;
      this->y = Y;
      this->z = Z;
   }

   virtual bool Equals( Object^ obj ) override
   {
      return Point::Equals( obj ) && z == (dynamic_cast<Point3D^>(obj))->z;
   }

   virtual int GetHashCode() override
   {
      return Point::GetHashCode() ^ z;
   }

};

import System;
import System.Drawing

class Point extends Object {
   var x : int;
   var y : int;

   public override function Equals(obj : Object) : Boolean {
      //Check for null and compare run-time types.
      if (obj == null || GetType() != obj.GetType()){
           return false;
      }
      var p : Point = Point(obj);
      return (x == p.x) && (y == p.y);
   }

   public override function GetHashCode() : int {
      return x ^ y;
   }
}

class Point3D extends Point {
   var z : int;

   public override function Equals(obj : Object) : Boolean{
      return super.Equals(obj) && z == (Point3D(obj)).z;
   }

   public override function GetHashCode() : int {
      return super.GetHashCode() ^ z;
   }
}

using System;

class Rectangle {
   Point a, b;

   public Rectangle(int upLeftX, int upLeftY, int downRightX, int downRightY) {
      this.a = new Point(upLeftX, upLeftY);
      this.b = new Point(downRightX, downRightY);
   }

   public override bool Equals(Object obj) {
     // Performs an equality check on two rectangles (Point object pairs).
      if (obj == null || GetType() != obj.GetType()) return false;
      Rectangle r = (Rectangle)obj;
      //Uses Equals to compare variables.
      return a.Equals(r.a) && b.Equals(r.b);
   }

   public override int GetHashCode() {
      return a.GetHashCode() ^ b.GetHashCode();
   }

}

ref class Rectangle
{
private:
   Point^ a;
   Point^ b;

public:
   Rectangle( int upLeftX, int upLeftY, int downRightX, int downRightY )
   {
      this->a = gcnew Point( upLeftX,upLeftY );
      this->b = gcnew Point( downRightX,downRightY );
   }

   virtual bool Equals( Object^ obj ) override
   {
      
      // Performs an equality check on two rectangles (Point object pairs).
      if ( obj == nullptr || GetType() != obj->GetType() )
            return false;

      Rectangle^ r = dynamic_cast<Rectangle^>(obj);
      
      //Uses Equals to compare variables.
      return a->Equals( r->a ) && b->Equals( r->b );
   }

   virtual int GetHashCode() override
   {
      return a->GetHashCode() ^ b->GetHashCode();
   }

};

import System;
import System.Drawing;

class Rectangle {
   var a : Point;
   var b : Point;

   public override function Equals(obj : Object) : Boolean {
      if (obj == null || GetType() != obj.GetType()) {
           return false;
      }
      
      var r : Rectangle = Rectangle(obj);
      //Uses Equals to compare variables.
      return a.Equals(r.a) && b.Equals(r.b);
   }

   public override function GetHashCode() : int {
      return a.GetHashCode() ^ b.GetHashCode();
   }
}

using System;

public struct Complex {
   public double re, im;

   public override bool Equals(Object obj) {
      return obj is Complex && this == (Complex)obj;
   }

   public override int GetHashCode() {
      return re.GetHashCode() ^ im.GetHashCode();
   }

   public static bool operator ==(Complex x, Complex y) {
      return x.re == y.re && x.im == y.im;
   }

   public static bool operator !=(Complex x, Complex y) {
      return !(x == y);
   }
}

using namespace System;
public value struct Complex
{
public:
   double re;
   double im;
   virtual bool Equals( Object^ obj ) override
   {
      return (dynamic_cast<Complex^>(obj) != nullptr) && (*this == *dynamic_cast<Complex^>(obj));
   }

   virtual int GetHashCode() override
   {
      return re.GetHashCode() ^ im.GetHashCode();
   }

   static bool operator==( Complex x, Complex y )
   {
      return x.re == y.re && x.im == y.im;
   }

   static bool operator!=( Complex x, Complex y )
   {
      return  !(x == y);
   }

};