object class

public class Object
{//from  j a  v a  2  s.c  o m
  public Object();
  
  public extern Type GetType();
  
  public virtual bool Equals (object obj);
  public static bool Equals  (object objA, object objB);
  public static bool ReferenceEquals (object objA, object objB);
  
  public virtual int GetHashCode();
  
  public virtual string ToString();
  
  protected override void Finalize();
  protected extern object MemberwiseClone();
}

using System;/*from java2  s  .  c o m*/

class Rectangle{
   
}

class Program
{
    static void Main(string[] args)
    {

        object o = new Rectangle();
    }
}