F# IEvent.create

Where is it gone ?

let triggerFindNext,findNextEvent = IEvent.create<EventArgs>()

The field, constructor or member 'create'开发者_开发问答 is not defined

maybe I must to add some Framework for it ?

The IEvent.create function has been deprecated. A new way of creating events is to create instance of the Event type. In the simplest case you can write just this:

let evt = new Event<EventArgs>() 

// Trigger event (instead of first element of the tuple)
evt.Trigger()
// Returns IEvent<EventArgs> value (instead of second element of the tuple)
evt.Publish

This represents event using IEvent<_> value (and doesn't generate .NET compatible event if you expose it as a property) and it uses generic Handler<_> delegate from F# libraries.

(If you want to generate .NET compatible event usable from C# then you need to add CLIEvent attribute and you can use variant of Event that takes delegate as generic parameter as described in the answer already mentioned by others)

EDIT: I posted a more complete F# snippet (with nicer formatting) here: http://fssnip.net/1d