diff --git a/src/Markdig/Helpers/StringLineGroup.cs b/src/Markdig/Helpers/StringLineGroup.cs
index 80a31059..cef3f603 100644
--- a/src/Markdig/Helpers/StringLineGroup.cs
+++ b/src/Markdig/Helpers/StringLineGroup.cs
@@ -187,7 +187,7 @@ public void Trim()
         }
     }
 
-    private struct Enumerator : IEnumerator
+    public struct Enumerator : IEnumerator
     {
         private readonly StringLineGroup _parent;
         private int _index;
@@ -210,12 +210,17 @@ public void Reset()
             _index = -1;
         }
     }
-
-    IEnumerator IEnumerable.GetEnumerator()
+    
+    public Enumerator GetEnumerator()
     {
         return new Enumerator(this);
     }
 
+    IEnumerator IEnumerable.GetEnumerator() 
+    {
+        (IEnumerator)GetEnumerator();
+    }
+
     private void IncreaseCapacity()
     {
         var newItems = _pool.Rent(Lines.Length * 2);
@@ -468,4 +473,4 @@ public LineOffset(int linePosition, int column, int offset, int start, int end)
 
         public readonly int End;
     }
-}
\ No newline at end of file
+}