Ejemplo de DbContext para medium.com/puntotech

efcore_dbcontext_conf.cs

using Microsoft.EntityFrameworkCore;

namespace PuntoTechApp
{
    public class MyContext : DbContext
    {
        protected override void OnConfiguring(DbContextOptionsBuilder options)
        {
            if (!options.IsConfigured)
            {
                IConfigurationRoot configuration = new ConfigurationBuilder()
                   .Build();
                options.UseSqlServer("Server=localhost;Database=PuntoTechApp;Trusted_Connection=True;").EnableSensitiveDataLogging();
            }
        }
    }
}