.NET: Parallel Loops, Parallel.For, Parallel.ForEach, and await Parallel.ForEachAsync

Run parallel loops and parallel async loops in .NET.

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int counter = 0;
ParallelOptions parallel_options = new()
{
	MaxDegreeOfParallelism = 3
};


//for
counter = 0;
Console.WriteLine("Parallel.For");
//parantheses around "index"/(index) are optional
Parallel.For(0, list.Count, parallel_options, (index) =>
{
	ProcessSync(list[index]);

	var progress = System.Threading.Interlocked.Increment(ref counter);
	Console.WriteLine(progress + "/" + list.Count);
});


//foreach sync
counter = 0;
Console.WriteLine("Parallel.ForEach");
Parallel.ForEach(list, parallel_options, (item, token) =>
{
	ProcessSync(item);

	var progress = System.Threading.Interlocked.Increment(ref counter);
	Console.WriteLine(progress + "/" + list.Count);
});


//foreach async
counter = 0;
Console.WriteLine("Parallel.ForEachAsync");
await Parallel.ForEachAsync(list, parallel_options, async (item, token) =>
{
	await ProcessAsync(item);

	var progress = System.Threading.Interlocked.Increment(ref counter);
	Console.WriteLine(progress + "/" + list.Count);
});