nathanaw

using System.Threading.Tasks

void Main()
{	
	var options = new ParallelOptions() {
		MaxDegreeOfParallelism = 2
	};
	
	Parallel.For(0, 10, options, i => ExecTaskSync(i));
	

nathanaw

// using System.Threading.Tasks

var maxIterations = 10000;
var maxDOP = 10;

// Divide into groups.
var parallelGroups = Enumerable.Range(0, maxIterations)
                               .GroupBy(r => (r % maxDOP));

var parallelTasks = parallelGroups.Select(groups =>

nathanaw

// using System.Threading.Tasks

const int MAX_DEGREE_OF_PARALLELISM = 2;
static SemaphoreSlim _semaphore = new SemaphoreSlim(MAX_DEGREE_OF_PARALLELISM);

async void Main()
{
	var tasks = Enumerable.Range(0, 10)
					.Select(i => ExecTask(i))
					.ToArray();