CourseWork_Bank/Bank/BankDatabaseImplement/BankDB.cs

using BankDatabaseImplement.Models;
using Microsoft.EntityFrameworkCore;
using System.Collections.Generic;

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

        public virtual DbSet<Client> Clients { set; get; }
        public virtual DbSet<Cost> Costs { set; get; }
        public virtual DbSet<CostByPurchase> CostByPurchases { set; get; }
        public virtual DbSet<Employee> Employees { set; get; }
        public virtual DbSet<Operation> Operations { set; get; }
        public virtual DbSet<OperationByPurchase> OperationByPurchases { set; get; }
        public virtual DbSet<Payment> Payments { set; get; }
        public virtual DbSet<Purchase> Purchases { set; get; }
    }
}