Install-Package Google.Protobuf
Install-Package Grpc.AspNetCore
Install-Package Grpc.Net.Client
Install-Package Grpc.Tools

//Add new file book.proto

syntax="proto3";

option csharp_namespace="GrpcBookServer";

package book;

message  BookProto{
    int64 id=1;
    string name=2;
    string isbn=3;
    string abstract=4;
    string author=5;
    string comment=6;
    string content=7;
    string summary=8;
    string title=9;
    string topic=10;
}

message GetBooksListRequest{
    int32 cnt=1;
}

message GetBooksListResponse{
    repeated BookProto books=1;
}

service BookService
{
    rpc GetBooksList(GetBooksListRequest) returns (GetBooksListResponse);
}
 

//Producer
//D:\C\ConsoleApp19\ConsoleApp19\Program.cs
using Google.Protobuf;
using Google.Protobuf.Collections;
using Grpc.Core;
using GrpcBookServer;
using Microsoft.AspNetCore.Builder;
using Microsoft.AspNetCore.Hosting;
using Microsoft.AspNetCore.Server.Kestrel.Core;
using Microsoft.Extensions.DependencyInjection;
using System.Runtime.Serialization;
using System.Threading.Tasks.Dataflow;

namespace ConsoleApp19
{
    internal class Program
    {
        static void Main(string[] args)
        {
            GrpcDemo();
            Console.ReadLine();
        }

        static async Task GrpcDemo()
        {
            var builder = WebApplication.CreateBuilder();
            builder.WebHost.ConfigureKestrel(serviceOptions =>
            {
                serviceOptions.ListenLocalhost(8888, x => x.Protocols = HttpProtocols.Http2);
            });

            builder.Services.AddGrpc(options =>
            {
                options.MaxSendMessageSize = null;
                options.MaxSendMessageSize = null;
            }); 

            var app = builder.Build();
            app.MapGrpcService<BookServiceImpl>();
            
            Console.WriteLine($"{DateTime.Now},the grpc service started at http://localhost:8888");
            await app.RunAsync("http://localhost:8888");
        }
    }

    public class BookServiceImpl:BookService.BookServiceBase
    {
        private static long id = 0;
        private static long GetIncrementId()
        {
            return Interlocked.Increment(ref id);
        }

        public List<Book> GetBooksList(int cnt=1000000)
        {
            var bksList = new List<Book>();
            for(int i=0;i<cnt;i++)
            {
                var a = GetIncrementId();
                bksList.Add(new Book()
                {
                    Id=a,
                    Name=$"Name_{a}",
                    ISBN=$"ISBN_{a}_{Guid.NewGuid():N}",
                    Abstract=$"Abstract_{a}",
                    Author=$"Author_{a}",
                    Comment=$"Comment_{a}",
                    Content=$"Content_{a}",
                    Summary=$"Summary_{a}",
                    Title=$"Title_{a}",
                    Topic=$"Topic_{a}"
                });
            }
            return bksList;
        }


        public override Task<GetBooksListResponse> GetBooksList(GetBooksListRequest request, ServerCallContext context)
        {
            var count = request.Cnt is 0 ? 1000000 : request.Cnt;
            var bksList = GetBooksList(count);

            var response=new GetBooksListResponse();
            response.Books.AddRange(bksList.ToProtoList());
            return Task.FromResult(response);
        }
    }

    public static class BookMapper
    {
        public static BookProto ToProtoBook(this Book bk)
        {
            return new BookProto
            {
                Id = bk.Id,
                Name = bk.Name ?? "",
                Isbn = bk.ISBN ?? "",
                Author=bk.Author??"",
                Abstract = bk.Abstract ?? "",
                Comment = bk.Comment ?? "",
                Content = bk.Content ?? "",
                Summary = bk.Summary ?? "",
                Title = bk.Title ?? "",
                Topic = bk.Topic ?? ""
            };
        }

        public static Book ToModel(this BookProto pt)
        {
            return new Book
            {
                Id = pt.Id,
                Name = pt.Name,
                ISBN = pt.Isbn,
                Abstract = pt.Abstract,
                Author = pt.Author,
                Comment=pt.Comment,
                Content=pt.Content,
                Summary=pt.Summary,
                Title=pt.Title,
                Topic=pt.Topic
            };
        }

        public static List<Book> ToModelList(this RepeatedField<BookProto> list)
        {
            return list.Select(ToModel).ToList();
        }

        public static List<BookProto> ToProtoList(this List<Book> list)
        {
            return list.Select(ToProtoBook).ToList();
        }
    }


     
    public class Book
    {
        public long Id { get; set; }
        public string Name { get; set; }
        public string ISBN { get; set; }
        public string Abstract { get; set; }
        public string Author { get; set; }
        public string Comment { get; set; }
        public string Content { get; set; }
        public string Summary { get; set; }
        public string Title { get; set; }
        public string Topic { get; set; }
    }

}

//D:\C\ConsoleApp20\ConsoleApp20\Program.cs
using Grpc.Net.Client;
using GrpcBookServer;

namespace ConsoleApp20
{
    internal class Program
    {
        private static string requestUrl = "http://localhost:8888";
        static GrpcChannel channel;
        static BookService.BookServiceClient client;
        static System.Timers.Timer tmr;
        static void Main(string[] args)
        {
            channel = GrpcChannel.ForAddress(requestUrl, new GrpcChannelOptions
            {
                MaxSendMessageSize =null,
                MaxReceiveMessageSize=null
            });
             
            client = new BookService.BookServiceClient(channel);
            Task.Run(async () =>
            {
                await ConsumeGrpcServiceAsync();
            });
            tmr = new System.Timers.Timer();
            tmr.Interval = 3000;
            tmr.Elapsed += async (s, e) =>
            {
               await  ConsumeGrpcServiceAsync();
            };
            tmr.Start();
            Console.ReadLine();
        }

        static async Task ConsumeGrpcServiceAsync(int cnt= 1000000)
        {
            var resp = await client.GetBooksListAsync(new GetBooksListRequest { Cnt = cnt });
            var books = resp.Books;
            Console.WriteLine($"{DateTime.Now},receive from server books count:{books.Count},First Id:{books.FirstOrDefault()?.Id},Last Id:{books.LastOrDefault()?.Id}");

        }
    }
}