Evilest C# Class Ever

EvilestClassEver.cs

using System;
using System.Collections.Generic;
using System.Threading.Tasks;
using static System.Console;

namespace ConsoleApplication2
{
    class Program
    {
        static string Str => $"This is the time: {DateTime.Now}";
        static async void Print(string str) => await Task.Run(() => WriteLine(str));
        static IEnumerable<string> Strings()
        {
            yield return Str;
            yield return nameof(Str);
        }

        static void Main(string[] args)
        {
            foreach (var str in Strings())
                Print($"{str}");
        }
    }
}

Why won't this class compile?