proto3 枚举生成疑问

比如如下定义

syntax = "proto3";

option csharp_namespace = "Demo";
option java_package = "Demo";

package Demo;

enum Scenario {
	scenario_unknow=0;
	type1=1;
	scenario2=2;
}

enum Color {
    COLOR_RED = 0;
    COLOR_GREEN = 1;
    COLOR_BLUE = 2;
}

生成的 C#代码

 #region Enums
  public enum Scenario {
    [pbr::OriginalName("scenario_unknow")] Unknow = 0,
    [pbr::OriginalName("type1")] Type1 = 1,
    [pbr::OriginalName("scenario2")] _2 = 2,
  }

  public enum Color {
    [pbr::OriginalName("COLOR_RED")] Red = 0,
    [pbr::OriginalName("COLOR_GREEN")] Green = 1,
    [pbr::OriginalName("COLOR_BLUE")] Blue = 2,
  }

  #endregion

java 代码

public enum Scenario
      implements com.google.protobuf.ProtocolMessageEnum {
    /**
     * <code>scenario_unknow = 0;</code>
     */
    scenario_unknow(0),
    /**
     * <code>type1 = 1;</code>
     */
    type1(1),
    /**
     * <code>scenario2 = 2;</code>
     */
    scenario2(2),
    UNRECOGNIZED(-1),
    ;
}

 public enum Color
      implements com.google.protobuf.ProtocolMessageEnum {
    /**
     * <code>COLOR_RED = 0;</code>
     */
    COLOR_RED(0),
    /**
     * <code>COLOR_GREEN = 1;</code>
     */
    COLOR_GREEN(1),
    /**
     * <code>COLOR_BLUE = 2;</code>
     */
    COLOR_BLUE(2),
    UNRECOGNIZED(-1),
    ;
}

可以看到生成后的枚举成员中自动将枚举名称替换成空白了.这导致 Scenario.scenario2 生成的代码中成员名为 _2

也许这多半是by design的,但是,是否有选项可以控制这种行为?

谢谢