c#中实现当一个类实例的属性值改变时，触发事件调用另一个方法

using System; 

namespace ConsoleApplication
{ 
class Program 
{ 
static void Main(string[] args) 
{ 
people p = new people("Name1"); 
p.PropertyChanged += new EventHandler(p_PropertyChanged);//注册事件处理函数 
p.Name = "Name2"; 
Console.ReadKey(); 
} 

static void p_PropertyChanged(object sender, EventArgs e)//事件的处理函数 
{ 
Console.WriteLine("NamePropertyChanged:"+(sender as people).Name); 
} 
} 
class people 
{ 

//事件名
public event EventHandler PropertyChanged; 
private string name=String .Empty; 
public people(string name) 
{ 
this.name = name; 
} 
public string Name 
{ 
get { return name; } 
set 
{ 
name = value; 
this.OnPropertyChanged(new EventArgs());//每次改变Name值调用方法; 
} 
} 

private void OnPropertyChanged(EventArgs eventArgs) 
{ 
if (this.PropertyChanged != null)//判断事件是否有处理函数 
{ 
this.PropertyChanged(this, eventArgs); 
} 
} 
} 
} 

如上面的代码实例可知，当name属性变化时，触发了PropertyChanged事件，开发人员就可以在调用此类时，当name属性发生改变时，做相应的处理。