Fisher-Yates Shuffle implemented in C#

Shuffle.cs

using System;
using System.Collections.Generic;
using System.Runtime.InteropServices;

namespace NetFabric
{
    public static class ShuffleExtensions
    {
        public static void Shuffle<T>(this List<T> source)
            => Shuffle(source, new Random());

        public static void Shuffle<T>(this List<T> source, Random random)
            => Shuffle(CollectionsMarshal.AsSpan(source), random);

        public static void Shuffle<T>(this Span<T> source)
            => Shuffle(source, new Random());

        public static void Shuffle<T>(this Span<T> source, Random random)
        {
            if (source.Length < 2)
                return;

            for (var currentIndex = 0; currentIndex < source.Length; currentIndex++)
            {
                var swapIndex = random.Next(currentIndex, source.Length);
                if (swapIndex != currentIndex) 
                    (source[swapIndex], source[currentIndex]) = (source[currentIndex], source[swapIndex]);
            }
        }
    }
}