Creating the Same Program in Windows Forms and WPF

using System;
using System.ComponentModel;
using System.IO;
using System.Reflection;

namespace BusinessObjects
{
public class Employee : INotifyPropertyChanged
{
    #region Creation

    public static Employee[] GetEmployees()
    {
        // In a real app this would probably call into a data access layer to get records from a database.
        return new Employee[]
        {
            new Employee(1, "Joe", "Smith", GetPictureFile(1), new DateTime(2000, 2, 12)),
            new Employee(2, "Frank", "Green", GetPictureFile(2), new DateTime(2002, 7, 1)),
            new Employee(3, "Martha", "Piccardo", GetPictureFile(3), new DateTime(2003, 1, 20)),
        };
    }

    private static string GetPictureFile(int employeeID)
    {
        string fileName = String.Format("emp{0}.jpg", employeeID);
        string folder = Path.GetDirectoryName(Assembly.GetExecutingAssembly().Location);
        folder = Path.Combine(folder, "Images");
        return Path.Combine(folder, fileName);
    }

    private Employee(int id, string firstName, string lastName, string pictureFile, DateTime startDate)
    {
        this.ID = id;
        this.FirstName = firstName;
        this.LastName = lastName;
        this.PictureFile = pictureFile;
        this.StartDate = startDate;
    }

    #endregion // Creation

    #region Properties

    public int ID { get; private set; }

    string _firstName;
    public string FirstName
    {
        get { return _firstName; }
        set
        {
            if (value == _firstName)
                return;

            _firstName = value;

            this.OnPropertyChanged("FirstName");
            this.OnPropertyChanged("FullName");
        }
    }

    string _lastName;
    public string LastName
    {
        get { return _lastName; }
        set
        {
            if (value == _lastName)
                return;

            _lastName = value;

            this.OnPropertyChanged("LastName");
            this.OnPropertyChanged("FullName");
        }
    }

    public string FullName 
    { 
        get { return String.Format("{0}, {1}", this.LastName, this.FirstName); } 
    }

    public string PictureFile { get; private set; }
    public DateTime StartDate { get; private set; }

    #endregion // Properties

    #region INotifyPropertyChanged Members

    public event PropertyChangedEventHandler PropertyChanged;

    protected virtual void OnPropertyChanged(string propertyName)
    {
        PropertyChangedEventHandler handler = this.PropertyChanged;
        if (handler != null)
            handler(this, new PropertyChangedEventArgs(propertyName));
    }

    #endregion
}
}