An Address Book Application Made in MVVM For Metro Style App in Windows 8 Part 2

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace Mvvm3_Basic.Model
{
    public class Contact : INotifyPropertyChanged
    {
        private string _guid;
        public string CGuid { get { return _guid; } set { _guid = value; CP("CGuid"); } }
        private string _name;
        public string Name { get { return _name; } set { _name = value; CP("Name"); } }
        private string _email;
        public string Email { get { return _email; } set { _email = value; CP("Email"); } }

        private void CP(string s)
        {
            if (PropertyChanged != null)
                PropertyChanged(this, new PropertyChangedEventArgs(s));
        }
        public event PropertyChangedEventHandler PropertyChanged;
    }
}