The async equivalent of Action<T> is Func<T, Task>, so I believe this is what you’re looking for: public async Task<T> DoSomethingAsync<T>(Func<T, Task> resultBody) where T : Result, new() { T result = new T(); await resultBody(result); return result; }
Okay, I finally have a real answer. I sort of worked it out on my own, but only after Lucian Wischik from the VB part of the team confirmed that there really is a good reason for it. Many thanks to him – and please visit his blog (on archive.org), which rocks. The value 0 … Read more
In most project types, your async “up” and “down” will end at an async void event handler or returning a Task to your framework. However, Console apps do not support this. You can either just do a Wait on the returned task: static void Main() { MainAsync().Wait(); // or, if you want to avoid exceptions … Read more
I don’t recommend StartNew unless you need that level of complexity. If your async method is dependent on other async methods, the easiest approach is to use the async keyword: private static async Task<DateTime> CountToAsync(int num = 10) { for (int i = 0; i < num; i++) { await Task.Delay(TimeSpan.FromSeconds(1)); } return DateTime.Now; } … Read more
First, let’s clear up some terminology: “asynchronous” (async) means that it may yield control back to the calling thread before it starts. In an async method, those “yield” points are await expressions. This is very different than the term “asynchronous”, as (mis)used by the MSDN documentation for years to mean “executes on a background thread”. … Read more
int[] ids = new[] { 1, 2, 3, 4, 5 }; Parallel.ForEach(ids, i => DoSomething(1, i, blogClient).Wait()); Although you run the operations in parallel with the above code, this code blocks each thread that each operation runs on. For example, if the network call takes 2 seconds, each thread hangs for 2 seconds w/o doing … Read more
Here’s a workaround I found that works for all cases (including suspended dispatchers). It’s not my code and I’m still working to fully understand it, but it does work. It can be called using: customerList = AsyncHelpers.RunSync<List<Customer>>(() => GetCustomers()); Code is from here public static class AsyncHelpers { /// <summary> /// Execute’s an async Task<T> … Read more