Can we enable Session in ASP.NET Core ? if yes then how we can enable Session in ASP.NET Core ?

To enable session in ASP.NET Core you can install Microsoft.AspNetCore.Session package.
With this done you can configure it as follows

public void ConfigureServices(IServiceCollection services){
      services.AddMvc();
      services.AddSession(options => {
         options.IdleTimeout = TimeSpan.FromMinutes(60);
      });
   }

You can access session with HttpContext.Session