Invalid generated C# code for the "record" class.

[vrelk-net]

What version of protobuf and what language are you using? Version:

• Google.Protobuf: 3.27.1
• Protoc: 27.1
• .NET 6.0 and .NET 7.0
• Language: C#

OS: Ubuntu 22.04 (protoc), Windows 11 (Visual Studio)

What runtime / compiler are you using (e.g., python version or gcc version):

• Visual Studio 2022: 17.7.6
  • MSBuild: 17.7.2
  • C# Tools: 4.7.0

What did you do? Steps to reproduce the behavior:

1. Generate the C# source using the command ./protoc --proto_path=../include --proto_path=central --csharp_out=out central/location.proto
2. Copy the .cs file into VS (same result when copying the file, or just the contents)
3. Build the project.
4. See error

Compiler errors

1>------ Build started: Project: ArubaCentral.Protobuf, Configuration: Debug Any CPU ------
1>C:\Users\user\source\repos\ArubaCentral.Protobuf\Location.cs(398,7,398,13): error CS1519: Invalid token 'return' in class, record, struct, or interface member declaration
1>C:\Users\user\source\repos\ArubaCentral.Protobuf\Location.cs(398,29,398,30): error CS1031: Type expected
1>C:\Users\user\source\repos\ArubaCentral.Protobuf\Location.cs(398,29,398,30): error CS1001: Identifier expected
1>Done building project "ArubaCentral.Protobuf.csproj" -- FAILED.

Along with the following errors that Visual Studio spits out in addition to the ones above.

Error	CS0535	'record' does not implement interface member 'IDeepCloneable<record>.Clone()'	Location.cs - Line 352
Error	CS0106	The modifier 'new' is not valid for this item	Location.cs - Line 398
Error	CS1520	Method must have a return type	Location.cs - Line 398
Error	CS0027	Keyword 'this' is not available in the current context	Location.cs - Line 398

generated Location.cs source location.proto