static void Main(string[] args)
{
var work = new DoSomething();
//immediately runs in a separate thread
var process1Task = Task.Run(() => work.Process1());
//immediately runs in a separate thread
var process2Task = Task.FromResult(work.Process2());
//blocks until it's done due to the 'Result' keyword
Console.WriteLine($"Status: {process2Task.Result}");
//let's kick off process3 immediately
var process3Task = _process3Async(work);
//and wait for it (meanwhile process 1 is still going likely)
var process3TaskResult = process3Task.Result;
Console.WriteLine($"Process3: {process3TaskResult}");
//if we don't wait, the main thread will exit before Process1 is complete.
//we'll never risk this with Process2 since we block until it's done
process1Task.Wait();
Console.WriteLine("All tasks complete!");
Console.ReadKey();
//now let's run three tasks but wait for them all to complete
//they will end in reverse order
Task.WaitAll(new Task[]
{
work.Process3Async(3000),
work.Process3Async(2000),
work.Process3Async(1000)
});
Console.WriteLine("All tasks complete!");
Console.ReadKey();
//now let's run three tasks but wait for ONLY ONE of them to complete
//they will end in reverse order
Task.WaitAny(new Task[]
{
work.Process3Async(3000),
work.Process3Async(2000),
work.Process3Async(1000)
});
Console.WriteLine("One task complete!");
Console.ReadKey();
}
//you can define an async task by using the 'async' keyword, the 'Task<TResult>` return type and the 'await keyword on something
//defined as a task
private static async Task <string> _process3Async(DoSomething work)
{
return(await work.Process3Async());
}
