Simplest way to run three methods in parallel in C#

Question

I have three methods that I call to do some number crunching that are as follows

results.LeftFront.CalcAi();  
results.RightFront.CalcAi();  
results.RearSus         


        

Answer 1

var task1 = SomeLongRunningTask();
var task2 = SomeOtherLongRunningTask();

await Task.WhenAll(task1, task2);

The benefit of this over Task.WaitAll is that this will release the thread and await the completion of the two tasks.