regenerate code

csharp/src/Google.Protobuf.Test.TestProtos/TestMessagesProto2.cs

diff --git a/csharp/src/Google.Protobuf.Test.TestProtos/TestMessagesProto2.cs b/csharp/src/Google.Protobuf.Test.TestProtos/TestMessagesProto2.cs
index 95a2423..de1ece3 100644
--- a/csharp/src/Google.Protobuf.Test.TestProtos/TestMessagesProto2.cs
+++ b/csharp/src/Google.Protobuf.Test.TestProtos/TestMessagesProto2.cs
@@ -2669,8 +2669,8 @@
       repeatedBytes_.WriteTo(output, _repeated_repeatedBytes_codec);
       repeatedNestedMessage_.WriteTo(output, _repeated_repeatedNestedMessage_codec);
       repeatedForeignMessage_.WriteTo(output, _repeated_repeatedForeignMessage_codec);
-      repeatedNestedEnum_.WriteTo(ref output, _repeated_repeatedNestedEnum_codec);
-      repeatedForeignEnum_.WriteTo(ref output, _repeated_repeatedForeignEnum_codec);
+      repeatedNestedEnum_.WriteTo(output, _repeated_repeatedNestedEnum_codec);
+      repeatedForeignEnum_.WriteTo(output, _repeated_repeatedForeignEnum_codec);
       repeatedStringPiece_.WriteTo(output, _repeated_repeatedStringPiece_codec);
       repeatedCord_.WriteTo(output, _repeated_repeatedCord_codec);
       mapInt32Int32_.WriteTo(output, _map_mapInt32Int32_codec);
@@ -2705,7 +2705,7 @@
       packedFloat_.WriteTo(output, _repeated_packedFloat_codec);
       packedDouble_.WriteTo(output, _repeated_packedDouble_codec);
       packedBool_.WriteTo(output, _repeated_packedBool_codec);
-      packedNestedEnum_.WriteTo(ref output, _repeated_packedNestedEnum_codec);
+      packedNestedEnum_.WriteTo(output, _repeated_packedNestedEnum_codec);
       unpackedInt32_.WriteTo(output, _repeated_unpackedInt32_codec);
       unpackedInt64_.WriteTo(output, _repeated_unpackedInt64_codec);
       unpackedUint32_.WriteTo(output, _repeated_unpackedUint32_codec);
@@ -2719,7 +2719,7 @@
       unpackedFloat_.WriteTo(output, _repeated_unpackedFloat_codec);
       unpackedDouble_.WriteTo(output, _repeated_unpackedDouble_codec);
       unpackedBool_.WriteTo(output, _repeated_unpackedBool_codec);
-      unpackedNestedEnum_.WriteTo(ref output, _repeated_unpackedNestedEnum_codec);
+      unpackedNestedEnum_.WriteTo(output, _repeated_unpackedNestedEnum_codec);
       if (HasOneofUint32) {
         output.WriteRawTag(248, 6);
         output.WriteUInt32(OneofUint32);

csharp/src/Google.Protobuf.Test.TestProtos/TestMessagesProto3.cs

diff --git a/csharp/src/Google.Protobuf.Test.TestProtos/TestMessagesProto3.cs b/csharp/src/Google.Protobuf.Test.TestProtos/TestMessagesProto3.cs
index 9630d7f..1d49f4c 100644
--- a/csharp/src/Google.Protobuf.Test.TestProtos/TestMessagesProto3.cs
+++ b/csharp/src/Google.Protobuf.Test.TestProtos/TestMessagesProto3.cs
@@ -2531,8 +2531,8 @@
       repeatedBytes_.WriteTo(output, _repeated_repeatedBytes_codec);
       repeatedNestedMessage_.WriteTo(output, _repeated_repeatedNestedMessage_codec);
       repeatedForeignMessage_.WriteTo(output, _repeated_repeatedForeignMessage_codec);
-      repeatedNestedEnum_.WriteTo(ref output, _repeated_repeatedNestedEnum_codec);
-      repeatedForeignEnum_.WriteTo(ref output, _repeated_repeatedForeignEnum_codec);
+      repeatedNestedEnum_.WriteTo(output, _repeated_repeatedNestedEnum_codec);
+      repeatedForeignEnum_.WriteTo(output, _repeated_repeatedForeignEnum_codec);
       repeatedStringPiece_.WriteTo(output, _repeated_repeatedStringPiece_codec);
       repeatedCord_.WriteTo(output, _repeated_repeatedCord_codec);
       mapInt32Int32_.WriteTo(output, _map_mapInt32Int32_codec);
@@ -2567,7 +2567,7 @@
       packedFloat_.WriteTo(output, _repeated_packedFloat_codec);
       packedDouble_.WriteTo(output, _repeated_packedDouble_codec);
       packedBool_.WriteTo(output, _repeated_packedBool_codec);
-      packedNestedEnum_.WriteTo(ref output, _repeated_packedNestedEnum_codec);
+      packedNestedEnum_.WriteTo(output, _repeated_packedNestedEnum_codec);
       unpackedInt32_.WriteTo(output, _repeated_unpackedInt32_codec);
       unpackedInt64_.WriteTo(output, _repeated_unpackedInt64_codec);
       unpackedUint32_.WriteTo(output, _repeated_unpackedUint32_codec);
@@ -2581,7 +2581,7 @@
       unpackedFloat_.WriteTo(output, _repeated_unpackedFloat_codec);
       unpackedDouble_.WriteTo(output, _repeated_unpackedDouble_codec);
       unpackedBool_.WriteTo(output, _repeated_unpackedBool_codec);
-      unpackedNestedEnum_.WriteTo(ref output, _repeated_unpackedNestedEnum_codec);
+      unpackedNestedEnum_.WriteTo(output, _repeated_unpackedNestedEnum_codec);
       if (oneofFieldCase_ == OneofFieldOneofCase.OneofUint32) {
         output.WriteRawTag(248, 6);
         output.WriteUInt32(OneofUint32);

csharp/src/Google.Protobuf.Test.TestProtos/Unittest.cs

diff --git a/csharp/src/Google.Protobuf.Test.TestProtos/Unittest.cs b/csharp/src/Google.Protobuf.Test.TestProtos/Unittest.cs
index ab8e55d..a843c4a 100644
--- a/csharp/src/Google.Protobuf.Test.TestProtos/Unittest.cs
+++ b/csharp/src/Google.Protobuf.Test.TestProtos/Unittest.cs
@@ -2949,9 +2949,9 @@
       repeatedNestedMessage_.WriteTo(output, _repeated_repeatedNestedMessage_codec);
       repeatedForeignMessage_.WriteTo(output, _repeated_repeatedForeignMessage_codec);
       repeatedImportMessage_.WriteTo(output, _repeated_repeatedImportMessage_codec);
-      repeatedNestedEnum_.WriteTo(ref output, _repeated_repeatedNestedEnum_codec);
-      repeatedForeignEnum_.WriteTo(ref output, _repeated_repeatedForeignEnum_codec);
-      repeatedImportEnum_.WriteTo(ref output, _repeated_repeatedImportEnum_codec);
+      repeatedNestedEnum_.WriteTo(output, _repeated_repeatedNestedEnum_codec);
+      repeatedForeignEnum_.WriteTo(output, _repeated_repeatedForeignEnum_codec);
+      repeatedImportEnum_.WriteTo(output, _repeated_repeatedImportEnum_codec);
       repeatedStringPiece_.WriteTo(output, _repeated_repeatedStringPiece_codec);
       repeatedCord_.WriteTo(output, _repeated_repeatedCord_codec);
       repeatedLazyMessage_.WriteTo(output, _repeated_repeatedLazyMessage_codec);
@@ -14258,7 +14258,7 @@
       }
       repeatedPrimitiveField_.WriteTo(output, _repeated_repeatedPrimitiveField_codec);
       repeatedStringField_.WriteTo(output, _repeated_repeatedStringField_codec);
-      repeatedEnumField_.WriteTo(ref output, _repeated_repeatedEnumField_codec);
+      repeatedEnumField_.WriteTo(output, _repeated_repeatedEnumField_codec);
       repeatedMessageField_.WriteTo(output, _repeated_repeatedMessageField_codec);
       repeatedStringPieceField_.WriteTo(output, _repeated_repeatedStringPieceField_codec);
       repeatedCordField_.WriteTo(output, _repeated_repeatedCordField_codec);
@@ -22901,7 +22901,7 @@
       packedFloat_.WriteTo(output, _repeated_packedFloat_codec);
       packedDouble_.WriteTo(output, _repeated_packedDouble_codec);
       packedBool_.WriteTo(output, _repeated_packedBool_codec);
-      packedEnum_.WriteTo(ref output, _repeated_packedEnum_codec);
+      packedEnum_.WriteTo(output, _repeated_packedEnum_codec);
       if (_unknownFields != null) {
         _unknownFields.WriteTo(output);
       }
@@ -23419,7 +23419,7 @@
       unpackedFloat_.WriteTo(output, _repeated_unpackedFloat_codec);
       unpackedDouble_.WriteTo(output, _repeated_unpackedDouble_codec);
       unpackedBool_.WriteTo(output, _repeated_unpackedBool_codec);
-      unpackedEnum_.WriteTo(ref output, _repeated_unpackedEnum_codec);
+      unpackedEnum_.WriteTo(output, _repeated_unpackedEnum_codec);
       if (_unknownFields != null) {
         _unknownFields.WriteTo(output);
       }

csharp/src/Google.Protobuf.Test.TestProtos/UnittestIssues.cs

diff --git a/csharp/src/Google.Protobuf.Test.TestProtos/UnittestIssues.cs b/csharp/src/Google.Protobuf.Test.TestProtos/UnittestIssues.cs
index bfa470f..a21a7c0 100644
--- a/csharp/src/Google.Protobuf.Test.TestProtos/UnittestIssues.cs
+++ b/csharp/src/Google.Protobuf.Test.TestProtos/UnittestIssues.cs
@@ -626,8 +626,8 @@
         output.WriteRawTag(8);
         output.WriteEnum((int) Value);
       }
-      values_.WriteTo(ref output, _repeated_values_codec);
-      packedValues_.WriteTo(ref output, _repeated_packedValues_codec);
+      values_.WriteTo(output, _repeated_values_codec);
+      packedValues_.WriteTo(output, _repeated_packedValues_codec);
       if (_unknownFields != null) {
         _unknownFields.WriteTo(output);
       }
@@ -1045,7 +1045,7 @@
         output.WriteRawTag(40);
         output.WriteEnum((int) EnumValue);
       }
-      enumArray_.WriteTo(ref output, _repeated_enumArray_codec);
+      enumArray_.WriteTo(output, _repeated_enumArray_codec);
       if (_unknownFields != null) {
         _unknownFields.WriteTo(output);
       }

csharp/src/Google.Protobuf.Test.TestProtos/UnittestProto3.cs

diff --git a/csharp/src/Google.Protobuf.Test.TestProtos/UnittestProto3.cs b/csharp/src/Google.Protobuf.Test.TestProtos/UnittestProto3.cs
index 8bedebf..b81eb57 100644
--- a/csharp/src/Google.Protobuf.Test.TestProtos/UnittestProto3.cs
+++ b/csharp/src/Google.Protobuf.Test.TestProtos/UnittestProto3.cs
@@ -1128,9 +1128,9 @@
       repeatedNestedMessage_.WriteTo(output, _repeated_repeatedNestedMessage_codec);
       repeatedForeignMessage_.WriteTo(output, _repeated_repeatedForeignMessage_codec);
       repeatedImportMessage_.WriteTo(output, _repeated_repeatedImportMessage_codec);
-      repeatedNestedEnum_.WriteTo(ref output, _repeated_repeatedNestedEnum_codec);
-      repeatedForeignEnum_.WriteTo(ref output, _repeated_repeatedForeignEnum_codec);
-      repeatedImportEnum_.WriteTo(ref output, _repeated_repeatedImportEnum_codec);
+      repeatedNestedEnum_.WriteTo(output, _repeated_repeatedNestedEnum_codec);
+      repeatedForeignEnum_.WriteTo(output, _repeated_repeatedForeignEnum_codec);
+      repeatedImportEnum_.WriteTo(output, _repeated_repeatedImportEnum_codec);
       repeatedPublicImportMessage_.WriteTo(output, _repeated_repeatedPublicImportMessage_codec);
       if (oneofFieldCase_ == OneofFieldOneofCase.OneofUint32) {
         output.WriteRawTag(248, 6);
@@ -4331,7 +4331,7 @@
       }
       repeatedPrimitiveField_.WriteTo(output, _repeated_repeatedPrimitiveField_codec);
       repeatedStringField_.WriteTo(output, _repeated_repeatedStringField_codec);
-      repeatedEnumField_.WriteTo(ref output, _repeated_repeatedEnumField_codec);
+      repeatedEnumField_.WriteTo(output, _repeated_repeatedEnumField_codec);
       repeatedMessageField_.WriteTo(output, _repeated_repeatedMessageField_codec);
       if (_unknownFields != null) {
         _unknownFields.WriteTo(output);
@@ -7315,7 +7315,7 @@
       packedFloat_.WriteTo(output, _repeated_packedFloat_codec);
       packedDouble_.WriteTo(output, _repeated_packedDouble_codec);
       packedBool_.WriteTo(output, _repeated_packedBool_codec);
-      packedEnum_.WriteTo(ref output, _repeated_packedEnum_codec);
+      packedEnum_.WriteTo(output, _repeated_packedEnum_codec);
       if (_unknownFields != null) {
         _unknownFields.WriteTo(output);
       }
@@ -7833,7 +7833,7 @@
       unpackedFloat_.WriteTo(output, _repeated_unpackedFloat_codec);
       unpackedDouble_.WriteTo(output, _repeated_unpackedDouble_codec);
       unpackedBool_.WriteTo(output, _repeated_unpackedBool_codec);
-      unpackedEnum_.WriteTo(ref output, _repeated_unpackedEnum_codec);
+      unpackedEnum_.WriteTo(output, _repeated_unpackedEnum_codec);
       if (_unknownFields != null) {
         _unknownFields.WriteTo(output);
       }