Evaluating methods in parallel

Question

Let's say I need the output from the below independent methods

var x = LongCalculation(123)
var y = LongCalculation2(345)
var z = LongCalculation3(678)
var b = LongCalculation4(910)

What is the least code invasive way of executing these calculations in parallel, without destroying the readability of the logic? I know of Parallel.Foreach() but in this case there is no list of items to process, only independent method calls.

Answer 1

I guess the least invasive way is using Parallel.Invoke:

long x, y, z, b;
Parallel.Invoke(
    () => x = LongCalculation(123),
    () => y = LongCalculation2(345),
    () => z = LongCalculation3(678),
    () => b = LongCalculation4(910)
);