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

namespace?CommandDemo
{
????public?class?Document?:?INotifyPropertyChanged
????{
????????private?string?openFilePath;
????????private?string?content;

????????public?bool?IsModified?{?get;?private?set;?}

????????public?string?Content
????????{
????????????get?{?return?content;?}
????????????set
????????????{
????????????????if?（value?!=?content）
????????????????{
????????????????????content?=?value;
????????????????????IsModified?=?true;
????????????????????onpropertychanged（“Content“）;
????????????????????onpropertychanged（“IsModified“）;
????????????????}
????????????}
????????}

????????public?void?Open（string?path）
????????{
????????????Content?=?File.ReadAllText（path）;
????????????openFilePath?=?path;
????????}

????????public?void?Save（）
????????{
????????????File.WriteAllText（ope

?屬性????????????大小?????日期????時間???名稱
-----------?---------??----------?-----??----
?????文件?????????161??2015-12-25?13:52??app.config
?????目錄???????????0??2015-12-25?14:33??Command\
?????文件????????4332??2015-12-25?15:13??CommandDemo.csproj
?????文件????????2217??2015-12-25?13:57??Command\Command.cs
?????文件????????3214??2015-12-25?13:55??Command\CommandBinding.cs
?????文件????????6410??2015-12-25?13:58??Command\CommandBindingManager.cs
?????文件????????5874??2015-12-25?14:33??Command\CommandParameter.cs
?????文件????????4680??2015-12-25?13:57??Command\CommandTarget.cs
?????文件????????1960??2015-12-25?13:59??Command\DelegateCommand.cs
?????文件????????1710??2015-12-25?15:08??Document.cs
?????文件????????1697??2015-12-25?15:15??MainForm.cs
?????文件????????6434??2015-12-25?15:15??MainForm.Designer.cs
?????文件????????8572??2015-12-25?15:14??MainForm.resx
?????文件????????1149??2015-12-25?15:12??OpenCommand.cs
?????文件?????????495??2015-12-25?14:07??Program.cs
?????目錄???????????0??2015-12-25?13:50??Properties\
?????文件????????1346??2015-12-25?13:50??Properties\AssemblyInfo.cs
?????文件????????2862??2015-12-25?13:52??Properties\Resources.Designer.cs
?????文件????????5612??2015-12-25?13:50??Properties\Resources.resx
?????文件????????1111??2015-12-25?13:52??Properties\Settings.Designer.cs
?????文件?????????249??2015-12-25?13:50??Properties\Settings.settings