How to find whether a property has changed ?

[PreethiParkavi]

Hi all,
I am not enough clear with "PropertyChanged" event handler.I want to do some operation if a specified property is changed.How do I know that a property has changed".Please help me in this issue.

Thanks,
Preethi

[Shashi Sadasivan]

You would have to create a public delegate

public delegate void SomeValueChanged(object sender, System.EventArgs e);
 
class MyClass
{
   public event SomeValueChanged SomeValueChangedEvent;
 
   private int valueToChange;
   public Value
   {
      get { return valueToChange; }
      set 
      { 
          valueToChange = value;
          //raising event here
          SomeValueChangedEvent(this, System.EventArgs.Empty);
      }
   }
}

You can specify your own event arguments class if you wish to do so.