class Person
{

    static void Main(string[] args)
    {
        Console.WriteLine("Simple Properties");

        // Create a new Person object:
        Person person = new Person();

// Print out the name and the age associated with he person:
        Console.WriteLine("Person details - {0}", person);

        // Set some values on the person object:
        person.Name = "Joe";
        person.Age = 99;
        Console.WriteLine("Person details - {0}", person);

        // Increment the Age property:
        person.Age += 1;
        Console.WriteLine("Person details - {0}", person);

    }

    // ÊôÐÔ¡£
    private string myName ="N/A";
    private int myAge = 0;
    // Declare a Name property of type string:
    public string Name
    {
        get
        {
            return myName;
        }
        set
        {
            myName = value;
        }
    }

    // Declare an Age property of type int:
    public int Age
    {
        get
        {
            return myAge;
        }
        set
        {
            myAge = value;
        }
        }

    public override string ToString()
    {
        return "Name = " + Name + ", Age = " + Age;
    }

}
// my questions is
 Console.WriteLine("Person details - {0}", person);
How to execute in this code of attribute.(come from msdn)