Person

This simple class illustrates and introduces the idea of encapsulation (private fields with public properties). This example does not have a constructor. This example includes a driver. The driver is also used to illustrate how, with only fields & getter/setter methods, an object can be in an "unknown" (and invalid) state as soon as it is created; this idea is introduced to show the need for a constructor, and opens the discussion of the idea of a "default constructor".

public class Person
{
    public string _FirstName
    public string _LastName
    public int _Age

    public string FirstName
    {
        get { return _FirstName; }
        set { _FirstName = value; }
    }
    public string LastName
    {
        get { return _LastName; }
        set { _LastName = value; }
    }
    public string Age
    {
        get { return _Age; }
        set { _Age = value; }
    }
}