CourseWork_EventVisitor/EventVisitor/EventVisitorDatabase/EventVisitorDbContext.cs

using EventVisitorDatabase.Entities;
using Microsoft.EntityFrameworkCore;

namespace EventVisitorDatabase
{
    public class EventVisitorDbContext: DbContext
    {
        protected override void OnConfiguring(DbContextOptionsBuilder optionsBuilder)
        {
            if (optionsBuilder.IsConfigured == false)
            {
                optionsBuilder.UseNpgsql("Host=localhost;Port=5432;Database=EventVisitorBd;Username=postgres;Password=1234");
            }
            base.OnConfiguring(optionsBuilder);
        }

        public virtual DbSet<VisitorEntity> Visitors { get; set; }
        public virtual DbSet<OrganizerEntity> Organizers { get; set; }
        public virtual DbSet<EventEntity> Events { get; set; }
    }
}