wpf ComboBox 绑定数据 （INotifyPropertyChanged）

using System;
using System.Collections.Generic;
using System.Configuration;
using System.Data;
using System.Linq;
using System.Windows;

namespace ComboBoxBindings
{
    /// 

    /// Interaction logic for App.xaml
    /// 

    public partial class App : Application
    {
    }
}

 属性            大小     日期    时间   名称
----------- ---------  ---------- -----  ----

     文件        297  2009-04-03 10:05  App.xaml

     文件        318  2009-04-03 10:06  App.xaml.cs

     文件       4358  2009-04-03 14:26  ComboBoxBindings.csproj

     文件        921  2009-04-03 10:06  ComboBoxBindings.sln

    ..A..H.     19968  2009-04-03 14:30  ComboBoxBindings.suo

     文件        745  2009-04-03 13:35  Dog.cs

     文件       1579  2009-04-03 14:26  EducationGradeConverter.cs

     文件       3619  2009-04-03 14:19  Person.cs

     文件       4885  2009-04-03 14:29  Window1.xaml

     文件       2537  2009-04-03 14:27  Window1.xaml.cs

     文件      16896  2009-04-03 14:30  bin\Debug\ComboBoxBindings.exe

     文件      50688  2009-04-03 14:30  bin\Debug\ComboBoxBindings.pdb

     文件      14328  2009-04-03 14:30  bin\Debug\ComboBoxBindings.vshost.exe

     文件       2086  2009-04-03 13:35  obj\Debug\App.g.cs

     文件        954  2009-04-03 14:30  obj\Debug\ComboBoxBindings.csproj.FileListAbsolute.txt

     文件        789  2009-04-03 13:35  obj\Debug\ComboBoxBindings.csproj.GenerateResource.Cache

     文件      16896  2009-04-03 14:30  obj\Debug\ComboBoxBindings.exe

     文件       3657  2009-04-03 14:30  obj\Debug\ComboBoxBindings.g.resources

     文件      50688  2009-04-03 14:30  obj\Debug\ComboBoxBindings.pdb

     文件        180  2009-04-03 14:26  obj\Debug\ComboBoxBindings.Properties.Resources.resources

     文件        224  2009-04-03 14:29  obj\Debug\ComboBoxBindings_MarkupCompile.cache

     文件         52  2009-04-03 14:29  obj\Debug\ComboBoxBindings_MarkupCompile.lref

     文件       2904  2009-04-03 14:29  obj\Debug\GeneratedInternalTypeHelper.g.cs

     文件       3435  2009-04-03 14:30  obj\Debug\Window1.baml

     文件       5187  2009-04-03 14:29  obj\Debug\Window1.g.cs

     文件       2302  2009-04-03 10:05  Properties\AssemblyInfo.cs

     文件       2861  2009-04-03 10:06  Properties\Resources.Designer.cs

     文件       5612  2009-04-03 10:05  Properties\Resources.resx

     文件       1101  2009-04-03 10:06  Properties\Settings.Designer.cs

     文件        201  2009-04-03 10:05  Properties\Settings.settings

............此处省略9个文件信息