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// Remember! Person extends Object.

class Person {}

Now, update your Main() method to interact with the inherited members of System.Object as

follows:

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U N D E R S TA N D I N G   I N H E R I TA N C E  A N D   P O LY M O R P H I S M

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8849CH06.qxd  10/1/07  10:35 AM  Page 213

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class Program

{

static void Main(string[] args)

{

Console.WriteLine("***** Fun with System.Object *****\n");

Person p1 = new Person();

// Use inherited members of System.Object.

Console.WriteLine("ToString: {0}", p1.ToString());

Console.WriteLine("Hash code: {0}", p1.GetHashCode());

Console.WriteLine("Type: {0}", p1.GetType());

// Make some other references to p1.

Person p2 = p1;

object o = p2;