ApiVersioningStartup.cs

using Microsoft.AspNetCore.Mvc.Versioning;
using Microsoft.Extensions.Options;
using Microsoft.OpenApi.Models;
using Swashbuckle.AspNetCore.SwaggerGen;
using System.Reflection;
using static ProtoBuf.Grpc.Configuration.ProtoBufMarshallerFactory;

namespace autogenerate_proto
{
    public static class ApiVersioningStartup
    {
        public static IServiceCollection AddApiVersioningStartup(this IServiceCollection services)
        {
            // Add Api Versioning
            services.AddApiVersioning(opt =>
            {
                opt.DefaultApiVersion = new Microsoft.AspNetCore.Mvc.ApiVersion(1, 0);
                opt.AssumeDefaultVersionWhenUnspecified = true;
                opt.ReportApiVersions = true;
                opt.ApiVersionReader = ApiVersionReader.Combine(new UrlSegmentApiVersionReader(),
                                                                new HeaderApiVersionReader("x-api-version"),
                                                                new MediaTypeApiVersionReader("x-api-version"));
                /*opt.ApiVersionReader = new UrlSegmentApiVersionReader();*/
            });
            // Add ApiExplorer to discover versions
            services.AddVersionedApiExplorer(o =>
            {
                o.GroupNameFormat = "'v'VVV";
                o.SubstituteApiVersionInUrl = true;
            });
            services.AddSwaggerGen(o =>
            {
                o.OperationFilter<SwaggerDefaultValues>();
                var xmlFile = $"{Assembly.GetExecutingAssembly().GetName().Name}.xml";
                var xmlPath = Path.Combine(AppContext.BaseDirectory, xmlFile);
                o.IncludeXmlComments(xmlPath);
                
            });
            // Configure Swagger
            services.AddTransient<IConfigureOptions<SwaggerGenOptions>, ConfigureSwaggerGenOptions>();
            return services;
        }
    }
}