diff --git a/X10D/src/StringExtensions.cs b/X10D/src/StringExtensions.cs
index d4145d3..e80f2c4 100644
--- a/X10D/src/StringExtensions.cs
+++ b/X10D/src/StringExtensions.cs
@@ -204,9 +204,14 @@
                 throw new ArgumentNullException(nameof(str));
             }
 
-            for (var i = 0; i < str.Length; i += chunkSize)
+            return SplitInternal();
+
+            IEnumerable<string> SplitInternal()
             {
-                yield return str.Substring(i, Math.Min(chunkSize, str.Length - i));
+                for (var i = 0; i < str.Length; i += chunkSize)
+                {
+                    yield return str.Substring(i, Math.Min(chunkSize, str.Length - i));
+                }
             }
         }