我用的比較多的框架是Prism，我們就可以借鑑一下Prism的INotifyPropertyChanged實現的原始碼

 1 public abstract class BindableBase : INotifyPropertyChanged
 2 {
 3     public event PropertyChangedEventHandler PropertyChanged;
 4 
 5     protected virtual bool SetProperty<T>(ref T storage, T value, [CallerMemberName] string propertyName = null
 
)
 6     {
 7         if (EqualityComparer<T>.Default.Equals(storage, value))
 8         {
 9             return false;
10         }
11         storage = value;
12         RaisePropertyChanged(propertyName);
13         return true;
14     }
15 
16     protected virtual bool SetProperty<T>(ref
 
 T storage, T value, Action onChanged, [CallerMemberName] string propertyName = null)
17     {
18         if (EqualityComparer<T>.Default.Equals(storage, value))
19         {
20             return false;
21         }
22         storage = value;
23         onChanged?.Invoke();
24         RaisePropertyChanged(propertyName);
 
25         return true;
26     }
27 
28     protected void RaisePropertyChanged([CallerMemberName] string propertyName = null)
29     {
30         OnPropertyChanged(new PropertyChangedEventArgs(propertyName));
31     }
32 
33     protected virtual void OnPropertyChanged(PropertyChangedEventArgs args)
34     {
35         this.PropertyChanged?.Invoke(this, args);
36     }
37 }

怎麼使用呢？其實很簡單，繼承一下BindableBase，然後就可以很簡單的實現動態通知了

1 class Sample : BindableBase
2     {
3         private string name;
4         public string Name
5         {
6             get { return name; }
7             set { SetProperty(ref name, value); }
8         }
9     }