C# INotifyPropertyChanged

INotifyPropertyChanged 向客户端发出某一属性值已更改的通知。

namespace System.ComponentModel
{
　　// Summary:
　　// Notifies clients that a property value has changed.
　　public interface INotifyPropertyChanged
　　{
　　// Summary:
　　// Occurs when a property value changes.
　　event PropertyChangedEventHandler PropertyChanged; 声明event的时候event后面的是delegate, 这里是PropertyChangedEventHandler.
　　}
}

PropertyChangedEventHandler

namespace System.ComponentModel
{
// Summary:
// Represents the method that will handle the System.ComponentModel.INotifyPropertyChanged.PropertyChanged
// event raised when a property is changed on a component.
//
// Parameters:
// sender:
// The source of the event.
//
// e:
// A System.ComponentModel.PropertyChangedEventArgs that contains the event
// data.
　　public delegate void PropertyChangedEventHandler(object sender, PropertyChangedEventArgs e);
}