EF Core Getting Started

Startup.cs

public void ConfigureServices(IServiceCollection services)
{
    services.Configure<CookiePolicyOptions>(options =>
    {
        // This lambda determines whether user consent for non-essential cookies is needed for a given request.
        options.CheckConsentNeeded = context => true;
        options.MinimumSameSitePolicy = SameSiteMode.None;
    });

    var connection = "Server=localhost;Port=5432;Database=Test;User Id=postgres;Password=postgres;";
    services.AddDbContext<AppContext>(options => options.UseNpgsql(connection));

    services.AddMvc().SetCompatibilityVersion(CompatibilityVersion.Version_2_2);
}