diff --git a/src/DotRecast.Core/Collections/CollectionExtensions.cs b/src/DotRecast.Core/Collections/CollectionExtensions.cs
index 82f5f5c..c610899 100644
--- a/src/DotRecast.Core/Collections/CollectionExtensions.cs
+++ b/src/DotRecast.Core/Collections/CollectionExtensions.cs
@@ -45,5 +45,11 @@ namespace DotRecast.Core.Collections
                 (list[k], list[n]) = (list[n], list[k]);
             }
         }
+
+        public static void AddRange<T>(this IList<T> list, Span<T> span)
+        {
+            foreach (var i in span) 
+                list.Add(i);
+        }
     }
 }
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