An example of using a lambda function to create a bridge between a settings class and IOptionsSnapshot<T>

Startup.cs

        public void ConfigureServices(IServiceCollection services)
        {        
            services.AddMvc();
            services.AddOptions();
            services.Configure<MyAppSettings>(Configuration.GetSection("MyAppSettings"));

            // use a lambda to act as the bridge between requesting an instance of MyAppSettings but 
            // getting it from IOptionsSnapshot<MyAppSettings>
            services.AddTransient<MyAppSettings>((opt) => opt.GetService<IOptionsSnapshot<MyAppSettings>>().Value);
        }