Multiple Tasks Z

public static async Task executeParallel<T>(this IEnumerable<T> items, int limit, Func<T, Task> actionMethod)
        {
            var allTasks = new List<Task>(); //Store all Tasks
            var activeTasks = new List<Task>();
            foreach (var item in items)
            {
                if (activeTasks.Count >= limit)
                {
                    var completedTask = await Task.WhenAny(activeTasks);
                    activeTasks.Remove(completedTask);
                }
                var task = actionMethod(item);
                allTasks.Add(task);
                activeTasks.Add(task);
            }
            await Task.WhenAll(allTasks); // Wait for all task to complete
        }

public async Task fun(int processId) { await Task.Run( () =>{ Random rand = new Random(); Console.WriteLine("Processing " + processId); Thread.Sleep(rand.Next(1500)); Console.WriteLine("Done processing - " + processId); }); }  internal async void process(List<int> queue,int limit)        {            await queue.executeParallel(limit, fun);        }https://www.codeproject.com/Tips/1264928/Throttling-Multiple-Tasks-to-Process-Requests-in-C