namespace Microsoft.FSharp.Control
{
    [CompilationMapping(SourceConstructFlags.ObjectType)]
    [CompiledName("FSharpAsync")]
    [Sealed]
    public sealed class FSharpAsync
    {
        public static FSharpAsync<T> AwaitEvent<TDel, T>(IEvent<TDel, T> event, [OptionalArgument] FSharpOption<FSharpFunc<Unit, Unit>> cancelAction)
            where TDel, Delegate;
    }
}