using System;

using System.Threading.Tasks;

​

public class Program

{

    public static void Main()

    {

C.M();

Task.Factory.StartNew(()=>C.setter(5), TaskCreationOptions.LongRunning);

Task.Factory.StartNew(()=>Console.WriteLine(C.getter()), TaskCreationOptions.LongRunning);

​

} 

}

class C

{

    public static Func<int> getter;

    public static Action<int> setter;

    public static void M()

    {

        int x = 0;

        getter = () => x;

        setter = y => { x = y; };

    }

}

​