Randomly outputs a value from a new line separated list retrieved from stdin

picker.cs

using System;
using System.Collections.Generic;

namespace Marzvrover
{
  class Picker
  {
    static void Main(string[] args)
    {
      string input;
      List<string> list = new List<string>();
      while (!string.IsNullOrEmpty(input = Console.ReadLine()))
      {
        list.Add(input);
      }
      Random index = new Random();
      Console.WriteLine(list[index.Next(0, list.Count)]);
    }
  }
}