fixed return type

OmegaLeo.HelperLib/Extensions/IListExtensions.cs

@@ -1,6 +1,7 @@
 using System;
 using System.Collections.Generic;
 using System.Linq;
+using System.Security.Cryptography;
 
 namespace GameDevLibrary.Extensions
 {
@@ -117,5 +118,30 @@ namespace GameDevLibrary.Extensions
         {
             return array[currentIndex++ % array.Count];
         }
+        
+        /// <summary>
+        /// Shuffle around items in a list.
+        /// Code obtained from https://stackoverflow.com/a/1262619
+        /// </summary>
+        /// <param name="list"></param>
+        /// <typeparam name="T"></typeparam>
+        public static IList<T> Shuffle<T>(this IList<T> list)
+        {
+            RNGCryptoServiceProvider provider = new RNGCryptoServiceProvider();
+            int n = list.Count;
+            while (n > 1)
+            {
+                byte[] box = new byte[1];
+                do provider.GetBytes(box);
+                while (!(box[0] < n * (Byte.MaxValue / n)));
+                int k = (box[0] % n);
+                n--;
+                (list[k], list[n]) = (list[n], list[k]);
+            }
+
+            return list;
+        }
+
+        
     }
 }

OmegaLeo.HelperLib/Helpers/BenchmarkUtility.cs

@@ -36,6 +36,25 @@ namespace GameDevLibrary.Helpers
             return stopwatch.ElapsedMilliseconds;
         }
         
+        public static long RecordAndSaveToResults(string key, Action actionToRecord)
+        {
+            var stopwatch = new Stopwatch();
+            stopwatch.Start();
+
+            actionToRecord.Invoke();
+            
+            stopwatch.Stop();
+            
+            if (!_benchmarks.ContainsKey(key))
+            {
+                _benchmarks[key] = new List<long>();
+            }
+            
+            _benchmarks[key].Add(stopwatch.ElapsedMilliseconds);
+            
+            return stopwatch.ElapsedMilliseconds;
+        }
+        
         public static void Start(string key)
         {
             GetStopwatch(key).Restart();

OmegaLeo.HelperLib/Models/InstancedObject.cs

@@ -0,0 +1,31 @@
+using System;
+
+namespace GameDevLibrary.Models
+{
+    public abstract class InstancedObject<T> where T : class
+    {
+        public static T Instance { get; private set; }
+
+        protected InstancedObject()
+        {
+            if (Instance != null)
+            {
+                throw new InvalidOperationException($"An instance of {typeof(T).Name} already exists.");
+            }
+
+            Instance = this as T;
+            if (Instance == null)
+            {
+                throw new InvalidOperationException($"Failed to cast {GetType().Name} to {typeof(T).Name}.");
+            }
+        }
+
+        ~InstancedObject()
+        {
+            if (Instance == this)
+            {
+                Instance = null;
+            }
+        }
+    }
+}

OmegaLeo.HelperLib/Models/NeoDictionary.cs

@@ -84,6 +84,9 @@ namespace GameDevLibrary.Models
         
         public IEnumerable<NeoDictionaryItem<TKey, TValue>> Select(Func<NeoDictionaryItem<TKey, TValue>, NeoDictionaryItem<TKey, TValue>> selector) =>
             Items.Select(selector);
+        
+        public int IndexOf(NeoDictionaryItem<TKey, TValue> selector) =>
+            Items.IndexOf(selector);
 
         public void Remove(TKey key)
         {