See also

[link:stackoverflow.com]

Hi,
You can use the F# "Event" type to create an event. If you want to compile it as a standard C# event declaration, you'll need to use "CLIEvent" attribute (this is new in the latest version). You can also use "DelegateEvent" type if you want to specify the delegate type explicitly (otherwise, F# uses some generic delegate type from FSharp.Core.dll):

 
namespace FSharpLib

// Declare class for testing, which can be used from C#
type Test() =
  // Declare event with 'EventHandler' delegate
  let evt1 = new DelegateEvent<System.EventHandler>()
  // Deckare event that'll use standard F# generic delegate type
  let evt2 = new Event<System.EventArgs>()

  // Expose the first event as C# event
  [<CLIEvent>]
  member x.Event1 = evt1.Publish
  member x.Foo1() = evt1.Trigger([| box x; box System.EventArgs.Empty |]) // trigger it

  // Expose the second event as C#-compatible event
  [<CLIEvent>]
  member x.Event2 = evt2.Publish
  member x.Foo2() = evt2.Trigger(System.EventArgs.Empty) // trigger it!