OpenBullet/RuriLib/Extensions.cs

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace RuriLib
{
    /// <summary>
    /// Extension methods for lists.
    /// </summary>
    public static class ListExtensions
    {
        /// <summary>
        /// Randomizes the elements in a list.
        /// </summary>
        /// <param name="list">The list to shuffle</param>
        /// <param name="rng">The random number generator</param>
        public static void Shuffle<T>(this IList<T> list, Random rng)
        {
            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;
            }
        }
    }
}