Mystic of c#

Question

I wrote a code using tutorial. That's original code from tutorial that works well:
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace SoloLearn
{
class Program
{
static void Main(string[] args)
{
string yourName;
Console.WriteLine("What is your name?");
yourName = Console.ReadLine();

Console.WriteLine("Hello {0}", yourName);
}
}
}
Why it don't work

Answer 1

It works perfectly fine? Just copy-and-pasted it into C.Playground and it compiled without problems.

Answer 2

Thanks for answers! I just made a mistake nConsole.Writeline, that's not correct! Correct is Console.WriteLine!