Startup.cs

using KSIMonitor.Data;
using KSIMonitor.Services;
using Microsoft.AspNetCore.Builder;
using Microsoft.AspNetCore.Hosting;
using Microsoft.EntityFrameworkCore;
using Microsoft.Extensions.Configuration;
using Microsoft.Extensions.DependencyInjection;
using Microsoft.Extensions.Hosting;
using Microsoft.Extensions.Logging;

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

        // This method gets called by the runtime. Use this method to add services to the container.
        public void ConfigureServices(IServiceCollection services) {
            services.AddLogging(builder => builder.AddConfiguration(Configuration));
            services.AddControllersWithViews();
            services.AddRazorPages();
            services.AddDatabaseDeveloperPageExceptionFilter();

            services.AddTransient<IEmailSender, EmailSender>();
            services.Configure<EmailSenderOptions>(Configuration.GetSection(EmailSenderOptions.SectionName));

            services.AddDbContext<IApplicationDBContext, ApplicationDBContext>(options =>
                options.UseSqlServer(Configuration.GetConnectionString("KSIMonitorAppDB")));

            services.AddDbContext<SETContext>(options =>
                options.UseMySQL(Configuration.GetConnectionString("SET_DB")));
        }

        // 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.UseMigrationsEndPoint();
            } else {
                app.UseExceptionHandler("/Home/Error");
                // The default HSTS value is 30 days. You may want to change this for production scenarios, see https://aka.ms/aspnetcore-hsts.
                app.UseHsts();
            }
            app.UseStatusCodePages();
            app.UseStatusCodePagesWithReExecute("/Home/HttpError", "?code={0}");

            app.UseHttpsRedirection();
            app.UseStaticFiles();

            app.UseRouting();

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

            app.UseEndpoints(endpoints => {
                endpoints.MapControllerRoute(
                    name: "default",
                    pattern: "{controller=Home}/{action=Index}/{id?}");
                endpoints.MapRazorPages();
            });
        }
    }
}