using System;

using System.Linq;

using System.Threading.Tasks;

​

public class Program

{

    static int counter = 0;

​

    static void Main()

    {

        foreach (int i in Enumerable.Range(0,100).ToArray())

            counter = Foo(counter).Result;

        Console.WriteLine(counter);

    }

​

    static async Task<int> Foo(int counter)

    {

        for(int i = 0; i < 100000; i++)

            counter = Set(counter);

        return counter;

    }

    static int Set(int counter)

    {

        return ++counter;

    }

}