diff --git a/inc/hgl/type/IndexedList.h b/inc/hgl/type/IndexedList.h
index 2e47296..543358f 100644
--- a/inc/hgl/type/IndexedList.h
+++ b/inc/hgl/type/IndexedList.h
@@ -278,14 +278,6 @@ namespace hgl
             return !(index<0||index>=data_index.GetCount());
         }
 
-        virtual void Exchange(int32 a,int32 b)
-        {
-            if(!IsValidIndex(a))return;
-            if(!IsValidIndex(b))return;
-
-            data_index.Exchange(a,b);
-        }
-
         virtual bool Insert(int32 pos,const T &value)
         {
             if(pos<0)return(false);