This looks like issue 8101
<https://github.com/protocolbuffers/protobuf/issues/8101>, which was fixed
very recently (PR 10268
<https://github.com/protocolbuffers/protobuf/pull/10268>). Unfortunately I
don't believe it's been included in a release yet, but you could fetch the
latest code to build a version of protoc with the fix, or temporarily
manually patch the generated code to add an underscore (so _400Url and
_400Url_).
On Thursday, 11 August 2022 at 14:15:28 UTC+1 wulun00 wrote:
> I tried to convert a proto file that contains fields beginning with
> underscores to a c# file, but it cannot be converted to the correct CS file
> example:
> msg.proto
> syntax = "proto2";
> message Msg {
> optional string _400Url = 1;
> }
>
> Msg.cs
> /// <summary>Field number for the "_400Url" field.</summary>
> public const int 400UrlFieldNumber = 1;
> private readonly static string 400UrlDefaultValue = "";
>
> private string 400Url_;
> [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
> [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
> public string 400Url {
> get { return 400Url_ ?? 400UrlDefaultValue; }
> set {
> 400Url_ = pb::ProtoPreconditions.CheckNotNull(value, "value");
> }
> }
>
> Unable to compile because of 400Url
>
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