Question

Suppose I have a ViewModel with Event Loaded. I want to release the the handler immediately after hook it up. It means only hookup one time. I want to use anonymous in following way:

EventHandler handler = (s, e) =>
{
   //......             
   vm.Loaded -= handler;;
};

vm.Loaded += handler;

it is not working. I don’t want to use named handler separately. What’s the solution for this case?

Answer 1

It should work if you declare the EventHandler first:

EventHandler handler = null;
handler = (s, e) => 
{    
    //......                 
    vm.Loaded -= handler;
};