Merge pull request #157 from CV1/patch-2

Update src/FluentNHibernate/MappingModel/EqualityExtensions.cs

src/FluentNHibernate/MappingModel/EqualityExtensions.cs

@@ -7,16 +7,17 @@ public static class EqualityExtensions
     {
         public static bool ContentEquals<TKey, TValue>(this IDictionary<TKey, TValue> left, IDictionary<TKey, TValue> right)
         {
-            if (left.Count() != right.Count())
+            if (left.Count != right.Count)
                 return false;
 
-            var index = 0;
             foreach (var item in left)
             {
-                if (!item.Equals(right.ElementAt(index)))
-                    return false;
-
-                index++;
+               var leftValue = item.Value;
+               TValue rightValue;
+               if (!right.TryGetValue(item.Key, out rightValue))
+                  return false; // Key mismatch
+               if (!Equals(leftValue, rightValue))
+                  return false; // Value mismatch
             }
 
             return true;