refactoring

Sledgemapper.Shared/ExtensionMethods.cs

@@ -0,0 +1,23 @@
+using System;
+using System.Collections.Generic;
+
+namespace SignalRChat.Hubs
+{
+    public static class ExtensionMethods
+    {
+        private static Random rng = new Random();
+
+        public static void Shuffle<T>(this IList<T> list)
+        {
+            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;
+            }
+        }
+    }
+}