Example - Run Tasks in parallel with PLINQ controlling/limiting max number of threads

SimpleParallelTaskExample.cs

using System;
using System.Linq;
using System.Threading.Tasks;

class Program
{
    const int generatedTasks = 10;
    const int maxThreads = 2;
    static Random random = new Random();

    static void Main(string[] args)
    {
        var tasks = Enumerable.Range(0, generatedTasks).Select(id => Task.Run(async () => await HeavyTask(id)));

        var results = tasks
            .AsParallel()
            .AsOrdered() //Optional
            .WithDegreeOfParallelism(maxThreads)
            .Select(t => t.Result)
            .ToList();
    }

    static async Task<int> HeavyTask(int id)
    {
        Console.WriteLine("Starting Task #" + id);
        await Task.Delay(random.Next(3000, 10000));
        Console.WriteLine("Finished Task #" + id);
        return id;
    }
}