Simple async EventHandler in Unity using Cysharp/UniTask

EventHandlerAsync.cs

using System;
using UniRx.Async;

public delegate UniTask EventHandlerAsync(object sender, EventArgs e);

public static class EventHandlerAsyncExtensions
{
	public static UniTask InvokeAsync(this EventHandlerAsync handler, object sender, EventArgs e)
	{
		Delegate[] delegates = handler?.GetInvocationList();

		if (delegates == null || delegates.Length == 0)
			return UniTask.CompletedTask;

		var tasks = new UniTask[delegates.Length];

		for (var i = 0; i < delegates.Length; i++)
		{
			tasks[i] = (UniTask) delegates[i].DynamicInvoke(sender, e);
		}

		return UniTask.WhenAll(tasks);
	}
}

ExampleUsage.cs

public class Example : MonoBehaviour
{
	public event EventHandlerAsync ExampleEvent;
	
	private void Start()
	{
		StartTest();
	}

	private async void StartTest()
	{
		await WaitForAll.InvokeAsync(this, EventArgs.Empty);
	}
}

Github refuses to use save any other TabWidth than 8 spaces for this gist, just know I'm not a monster...