Trying to add a session to a project?

Question

ASP.NET

I'm trying to add a line to the session:
HttpContext.Session.SetString("Train", "wewew");
In ConfigureServices I added:

services.AddDistributedMemoryCache();
services.AddSession();

In Configure added:

app.UseAuthentication();
app.UseSession();
      app.UseMvc(routes =>
      {
        routes.MapRoute(
          name: "default",
          template: "{controller=Home}/{action=Index}/{id?}");
      });

And it gives an error:

An unhandled exception occurred while processing the request.
InvalidOperationException: Session has not been configured for this application or request.
Microsoft.AspNetCore.Http.DefaultHttpContext.get_Session()

Answer 1

In configure add
app.UseSession();