public static Func<Mode, TEventArgs> Create<TDelegate, TEventArgs>(
Func<Action<object, TEventArgs>, TDelegate> converter,
Action<TDelegate> addHandler,
Action<TDelegate> removeHandler
)
{
AutoResetEvent semaphore = new AutoResetEvent(false);
TEventArgs args = default(TEventArgs);
TDelegate handler = converter((s, e) => { args = e; semaphore.Set(); });
addHandler(handler);
return mode =>
{
if (mode == Mode.Wait)
{
semaphore.WaitOne();
return args;
}
else
{
removeHandler(handler);
return default(TEventArgs);
}
};
}