using System;
 
 
// Define a reference type that does not override Equals.
public class Person
{
   private string personName;
 
   public Person(string name)
   {
      this.personName = name;
   }
 
  public override string ToString()
  {
   return this.personName;
  }
}
 
public class Example
{
   public static void Main()
   {
      Person person1a = new Person("John");
      Person person1b = person1a;
      Person person2 = new Person(person1a.ToString());
      string sr1="j";
      object sr=sr1;
    // string str=sr;
      Console.WriteLine(sr);
 
      Person person1c = new Person("John");
 
      Console.WriteLine("Calling Equals:"); 
      Console.WriteLine("person1a and person1b: {0}", person1a.Equals(person1b));               
      Console.WriteLine("person1a and person2: {0}", person1a.Equals(person1c));  
 
      Console.WriteLine("\nCasting to an Object and calling Equals:");
      Console.WriteLine("person1a and person1b: {0}", ((object) person1a).Equals((object) person1b));
      Console.WriteLine("person1a and person2: {0}", ((object) person1a).Equals((object) person2)); 
   }
}

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