Startup.cs

using System;
using System.Collections.Generic;
using System.Linq;
using System.Threading.Tasks;
using Dotnet5.Authentication;
using Dotnet5.Filters;
using Microsoft.AspNetCore.Builder;
using Microsoft.AspNetCore.Hosting;
using Microsoft.AspNetCore.Http;
using Microsoft.AspNetCore.HttpsPolicy;
using Microsoft.AspNetCore.Identity;
using Microsoft.AspNetCore.Mvc;
using Microsoft.EntityFrameworkCore;
using Microsoft.Extensions.Configuration;
using Microsoft.Extensions.DependencyInjection;
using Microsoft.Extensions.Hosting;
using Microsoft.Extensions.Logging;
using Microsoft.OpenApi.Models;
using Microsoft.AspNetCore.Authentication.JwtBearer;
using Microsoft.IdentityModel.Tokens;
using System.Text;
using Microsoft.AspNetCore.Diagnostics.HealthChecks;
using Microsoft.Extensions.Diagnostics.HealthChecks;
using System.Reflection;
using Microsoft.EntityFrameworkCore.Diagnostics;

namespace dotnet5
{
    public class Startup
    {
        public Startup(IConfiguration configuration)
        {
            Configuration = configuration;
        }

        public IConfiguration Configuration { get; }

        // This method gets called by the runtime. Use this method to add services to the container.
        public void ConfigureServices(IServiceCollection services)
        {

            services.AddControllers();
            services.AddDbContext<ApplicationDbContext>(options =>
            {
                options.UseSqlServer(Configuration.GetConnectionString("SqlServer"),
                sqlServerOptionsAction: sqlOptions =>
                {
                    sqlOptions.EnableRetryOnFailure(
                    maxRetryCount: 10,
                    maxRetryDelay: TimeSpan.FromSeconds(30),
                    errorNumbersToAdd: null);
                });
            });


            // For Identity  
            services.AddIdentity<ApplicationUser, IdentityRole>()
       .AddEntityFrameworkStores<ApplicationDbContext>()
       .AddDefaultTokenProviders();

            // Adding Authentication  
            services.AddAuthentication(options =>
           {
               options.DefaultAuthenticateScheme = JwtBearerDefaults.AuthenticationScheme;
               options.DefaultChallengeScheme = JwtBearerDefaults.AuthenticationScheme;
               options.DefaultScheme = JwtBearerDefaults.AuthenticationScheme;
           })
           // Adding Jwt Bearer  
           .AddJwtBearer(options =>
           {
               options.SaveToken = true;
               options.RequireHttpsMetadata = false;
               options.TokenValidationParameters = new TokenValidationParameters()
               {
                   ValidateIssuer = true,
                   ValidateAudience = true,
                   ValidAudience = Configuration["JWT:ValidAudience"],
                   ValidIssuer = Configuration["JWT:ValidIssuer"],
                   IssuerSigningKey = new SymmetricSecurityKey(Encoding.UTF8.GetBytes(Configuration["JWT:Secret"]))
               };
           });

            services.AddHealthChecks().AddDbContextCheck<ApplicationDbContext>();
            services.AddSwaggerGen(c =>
            {
                c.SwaggerDoc("v1", new OpenApiInfo { Title = "dotnet5", Version = "v1" });
            });
            services.AddStackExchangeRedisCache(options =>
            {
                options.Configuration = Configuration.GetConnectionString("Redis");
                options.InstanceName = "my-redis_";
            });
            services.AddMvcCore(options =>
            {
                options.Filters.Add(typeof(CustomExceptionHandlerFilter));
            });
        }

        // This method gets called by the runtime. Use this method to configure the HTTP request pipeline.
        public void Configure(IApplicationBuilder app, IWebHostEnvironment env)
        {
            if (env.IsDevelopment())
            {
                app.UseDeveloperExceptionPage();
                app.UseSwagger();
                app.UseSwaggerUI(c => c.SwaggerEndpoint("/swagger/v1/swagger.json", "dotnet5 v1"));
            }

            // app.UseHttpsRedirection();

            app.UseRouting();

            app.UseAuthentication();
            app.UseAuthorization();

            app.UseEndpoints(endpoints =>
            {
                endpoints.MapHealthChecks("/health", new HealthCheckOptions()
                {
                    ResultStatusCodes =
                    {
                        [HealthStatus.Healthy] = StatusCodes.Status200OK,
                        [HealthStatus.Degraded] = StatusCodes.Status200OK,
                        [HealthStatus.Unhealthy] = StatusCodes.Status503ServiceUnavailable
                    }
                }).RequireAuthorization();
                endpoints.MapGet("/", async context =>
                {
                    await context.Response.WriteAsync($"goto https://localhost:5001/swagger for Swagger implementation");
                });
                endpoints.MapControllers();
            });
        }
    }
}