[Description("BookDescription")]
        [DataContract]
        public class BookDescription
        {
            [Description("ID")]
            [DataMember(Order = 1)]
            public int ID { get; set; }

            [Description("Title")]
            [DataMember(Order = 2)]
            public string Title { get; set; }

            [Description("Tags")]
            public Dictionary<int, string> Tags { get; set; }

            [Description("PriceChanges")]
            public int[] PriceChanges { get; set; }
            [Description("Type")]
            public BookType Type { get; set; }
        }

syntax = ""proto3"";
package protobuf_net.Grpc.Reflection.Test;
import ""google/protobuf/empty.proto"";

// BookDescription
message BookDescription {
   // ID
   int32 ID = 1;
   // Title
   string Title = 2;
}
// BookType
enum BookType {
   Biology = 0;
   Chemistry = 1;
}
// BookDescription
message BookTypeDescription {
}
// BookService
service BookService {
   // GetBookInfo
   rpc GetBookInfo (.google.protobuf.Empty) returns (BookDescription);
   // GetBookTypes
   rpc GetBookTypes (.google.protobuf.Empty) returns (BookTypeDescription);
}