diff -r fbf22ccd9d6f -r 0ee888c485d5 Collections/ReadOnlyArray.cs
--- a/Collections/ReadOnlyArray.cs	Tue Sep 21 10:33:28 2010 +0000
+++ b/Collections/ReadOnlyArray.cs	Tue Sep 21 20:32:36 2010 +0000
@@ -35,7 +35,6 @@
  
 */
 
-using System;
 using System.Collections;
 using System.Collections.Generic;
 
@@ -43,7 +42,7 @@
 
   public class ReadOnlyArray<T> : IReadOnlyArray<T> {
 
-    private T[] array;
+    private readonly T[] array;
 
     public ReadOnlyArray(T[] array) {
       this.array = array;