Extension methods to shuffle a list in place, or return a random item

ShuffleListExtensions.cs

using System;
using System.Collections;
using System.Collections.Generic;

public static class ShuffleListExtensions {

    /// <summary>
    /// Shuffle the list in place using the Fisher-Yates method.
    /// </summary>
    /// <typeparam name="T"></typeparam>
    /// <param name="list"></param>
    public static void Shuffle<T>(this IList<T> list)  
    {  
    	Random rng = new Random();  
    	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;  
    	}  
    }

    /// <summary>
    /// Return a random item from the list.
    /// Sampling with replacement.
    /// </summary>
    /// <typeparam name="T"></typeparam>
    /// <param name="list"></param>
    /// <returns></returns>
    public static T RandomItem<T>(this IList<T> list)
    {
        if (list.Count == 0) throw new System.IndexOutOfRangeException("Cannot select a random item from an empty list");
        return list[UnityEngine.Random.Range(0, list.Count)];
    }

    /// <summary>
    /// Removes a random item from the list, returning that item.
    /// Sampling without replacement.
    /// </summary>
    /// <typeparam name="T"></typeparam>
    /// <param name="list"></param>
    /// <returns></returns>
    public static T RemoveRandom<T>(this IList<T> list)
    {
        if (list.Count == 0) throw new System.IndexOutOfRangeException("Cannot remove a random item from an empty list");
        int index = UnityEngine.Random.Range(0, list.Count);
        T item = list[index];
        list.RemoveAt(index);
        return item;
    }
}