0. 맨 먼저 Startup.cs 설정 COnfigureService와 Configure에 각각 AddSession과 UseSession을 추가한다. namespace EmployeeManagement { public class Startup { private readonly IConfiguration _config; public Startup(IConfiguration config) { _config = config; } public IConfigurationRoot Configuration { get; } public void ConfigureServices(IServiceCollection services) { services.AddSession(options => { options.IdleTime..