get random from list c#

using System;
using System.Collections.Generic;
namespace Demo {
   class Program {
      static void Main(string[] args) {
         var random = new Random();
         var list = new List<string>{ "one","two","three","four"};
         int index = random.Next(list.Count);
         Console.WriteLine(list[index]);
      }
   }
}

private static Random rng = new Random();  

public static void Shuffle<T>(this IList<T> list)  
{  
    int n = list.Count;  
    while (n > 1) {  
        n--;  
        int k = rng.Next(n + 1);  
        T value = list[k];  
        list[k] = list[n];  
        list[n] = value;  
    }  
}