DB/TransportGuideDatabaseImplements/TransportGuideDB.cs

using Microsoft.EntityFrameworkCore;
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Configuration;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using TransportGuideDatabaseImplements.Models;

namespace TransportGuideDatabaseImplements
{
    public class TransportGuideDB : DbContext
    {
		string dbName = ConfigurationManager.AppSettings["connectToDb"];


		protected override void OnConfiguring(DbContextOptionsBuilder optionsBuilder)
		{
			if (optionsBuilder.IsConfigured == false)
			{
				optionsBuilder.UseNpgsql(dbName);
			}
			base.OnConfiguring(optionsBuilder);
		}
		public virtual DbSet<Route> Routes { set; get; }
		public virtual DbSet<Stop> Stops { set; get; }
		public virtual DbSet<StopRoute> StopRoutes { set; get; }
		public virtual DbSet<TransportType> TransportTypes { set; get; }
	}
}