DEMOMySql/MicroServices/Procurement/Procurement.Host/Startup.cs

using Microsoft.AspNetCore.Builder;
using Microsoft.AspNetCore.Hosting;
using Microsoft.Extensions.Configuration;
using Microsoft.Extensions.DependencyInjection;
using Microsoft.Extensions.Logging;
using NLog.Targets;

namespace Procurement
{
    public class Startup
    {
        public static IConfiguration Configuration { get; private set; }

        public Startup(IConfiguration configuration)
        {
            Configuration = configuration;
        }

        public void ConfigureServices(IServiceCollection services)
        {
            string connectionStringDefault = "";
            connectionStringDefault = Configuration["connectionStrings:Default"];
            NLog.LogManager.Configuration.FindTargetByName<DatabaseTarget>("db").ConnectionString = connectionStringDefault;

            services.AddApplication<ProcurementHostModule>();
            services.AddMvc(options =>
            {
                options.ReturnHttpNotAcceptable = true;
            })
            .AddJsonOptions(options =>
            {
                options.JsonSerializerOptions.PropertyNamingPolicy = null;
            });
        }

        public void Configure(IApplicationBuilder app, IWebHostEnvironment env, ILoggerFactory loggerFactory)
        {
            app.InitializeApplication();
        }
    }
}