1: private void button1_Click(object sender, EventArgs e)

   2:         {

   3: DoSomething();

   4:          }

   1: public string Name

   2: {

   3: get { return name; }

   4: set { name = value; 

   5: OnPropertyChanged("Name");//point 4 

   6: }

   1: using System.ComponentModel; //point 1

   2: class Person:INotifyPropertyChanged //point 2

   3: {

   4:  

   5: string name;

   6: public string Name

   7: {

   8:  

   9: get { return name; }

  10:  

  11: set { name = value; 

  12: OnPropertyChanged("Name");//point 4 

  13:  

  14: }

  15:  

  16: }

  17:  

  18: protected void OnPropertyChanged(string property)//point 3

  19: {

  20: if (PropertyChanged != null)

  21: {

  22: PropertyChanged(this,new PropertyChangedEventArgs(property));

  23: }

  24:  

  25: }

  26: public event PropertyChangedEventHandler PropertyChanged;//point 2

   1: Person p = new Person("FCI-H", 1);

   2: p.PropertyChanged += new System.ComponentModel.PropertyChangedEventHandler(p_PropertyChanged);

   3: void p_PropertyChanged(object sender, System.ComponentModel.PropertyChangedEventArgs

   4: e)

   5: {

   6: switch (e.PropertyName)

   7: {

   8: case "Name":

   9: nameTxt.Text = p.Name;

  10: break;

  11: }

  12: }