Test async main in C#

AsyncMain.cs

class Program
{
    static async Task Main(string[] args)
    {
        var t = new AsyncTest();
        await t.DoTest();
    }
}

class AsyncTest
{
    public async Task DoTest()
    {
        Console.WriteLine($"Sync \t{Sync()} ms");
        Console.WriteLine($"Async \t{await Async()} ms");
    }

    double Sync()
    {
        DateTime now = DateTime.Now;
        int total = 0;
        for (int i = 0; i < 100000; i++)
        {
            total += 1;
        }

        return (DateTime.Now - now).TotalMilliseconds;
    }

    async Task<double> Async()
    {
        DateTime now = DateTime.Now;

        int total = 0;
        await Task.Run(() =>
        {
            for (int i = 0; i < 100000; i++)
            {
                total += 1;
            }
        });

        return (DateTime.Now - now).TotalMilliseconds;
    }
}