What will be the output of the below code segment?

class Program
{
static void Main(string[] args)
{
Console.WriteLine(new List<double>() { 1, 2.06, -36.4, -4, 5.90, 61.9, 79.8, 8, 9, 18.0, 23.7 }.OrderByDescending(o => o).Take(1).Single());
Console.ReadKey(true);
}
}