diff --git a/csharp/src/Google.Protobuf/WritingPrimitives.cs b/csharp/src/Google.Protobuf/WritingPrimitives.cs
index 8b81ee5e7afd..2dc1d76118f0 100644
--- a/csharp/src/Google.Protobuf/WritingPrimitives.cs
+++ b/csharp/src/Google.Protobuf/WritingPrimitives.cs
@@ -399,9 +399,9 @@ public static void WriteLength(ref Span<byte> buffer, ref WriterInternalState st
             WriteRawVarint32(ref buffer, ref state, (uint)length);
         }
 
-#endregion
+        #endregion
 
-#region Writing primitives
+        #region Writing primitives
         /// <summary>
         /// Writes a 32 bit value as a varint. The fast route is taken when
         /// there's enough buffer space left to whizz through without checking
@@ -584,9 +584,9 @@ public static void WriteRawBytes(ref Span<byte> buffer, ref WriterInternalState
                 state.position += remainderLength;
             }
         }
-#endregion
+        #endregion
 
-#region Raw tag writing
+        #region Raw tag writing
         /// <summary>
         /// Encodes and writes a tag.
         /// </summary>
@@ -715,7 +715,7 @@ private static void WriteRawTagSlowPath(ref Span<byte> buffer, ref WriterInterna
             WriteRawByte(ref buffer, ref state, b4);
             WriteRawByte(ref buffer, ref state, b5);
         }
-#endregion
+        #endregion
 
         /// <summary>
         /// Encode a 32-bit value with ZigZag encoding.