Merge branch 'master' of http://git.newlifex.com/NewLife/NewLife.XCode

XCode/Entity/DirtyCollection.cs

@@ -65,11 +65,11 @@ public Boolean Add(String key, Object? value)
                     // 扩容
                     var arr = new String[ks.Length * 2];
                     Array.Copy(ks, arr, ks.Length);
-                    ks = _keys = arr;
 
                     var arr2 = new Object[arr.Length];
                     Array.Copy(vs, arr2, vs.Length);
                     vs = _values = arr2;
+                    ks = _keys = arr;
                 }
             }
         }