The Fisher–Yates shuffle array extension method, C#

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//Rextester.Program.Main is the entry point for your code. Don't change it.
//Compiler version 4.0.30319.17929 for Microsoft (R) .NET Framework 4.5

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text.RegularExpressions;

namespace Rextester
{
    public class Program
    {
        public static void Main(string[] args)
        {
            var randomDigits = Enumerable.Range(0, 10).ToArray().Shuffle();
            
            foreach(var digit in randomDigits)
            {
                Console.Write("{0} ", digit);
            }
        }
    }
    
    
    public static class ArrayExtensions
    {
        private static Random random = new Random();

public static T[] Shuffle<T>(this T[] array)
        {
            int n = array.Length;
            for (int i = 0; i < n; i++)
            {
                int r = i + random.Next(n - i);
                T t = array[r];
                array[r] = array[i];
                array[i] = t;
            }
            return array;
        }
    }

}

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Compilation time: 0,16 sec, absolute running time: 0,09 sec, cpu time: 0,08 sec, average memory usage: 11 Mb, average nr of threads: 3