Why does Task.WhenAll() hang when doing multiple tasks?

Question

.NET

I want to run multiple tasks at the same time

static async void TestMethod()
        {
            Task<string>[] allTasks = new Task<string>[5];

            for(int i = 0; i < 5; i++)
            {
                int j = i;
                allTasks[i] = new Task<string>(() => { return "#" + j; });
            }

            var resultTask = Task.WhenAll(allTasks);
            Console.WriteLine(resultTask.Status);

            var result = resultTask.Result;

            foreach (var res in result)
            {
                Console.WriteLine("1");
                Console.WriteLine(res);
            }

            Console.WriteLine("END");
        }

But this code freezes after the execution of WhenAll, the resultTask has the WaitingForActivation status, the execution never reaches the line resultTask.Result

Answer 1

The constructor new Task({} => {})only initiates the task.
It can then be put to execution by calling the Start method.
Example:

var task = new Task({} => {});
task.Start();

You can also start a task using the Task.Run или TaskFactory.StartNewmethods