parr_api/PARR.DAL/ParrDalInstaller.cs

using Microsoft.EntityFrameworkCore;
using Microsoft.Extensions.Configuration;
using Microsoft.Extensions.DependencyInjection;
using PARR.DAL.Context;
using PARR.DAL.Services.Implementations;
using PARR.DAL.Services.Interfaces;

namespace PARR.DAL
{
    public static class ParrDalInstaller
    {
        public static void InstallDalServices(this IServiceCollection services, IConfiguration configuration)
        {
            services.AddDbContext<DataContext>(opt =>
              opt.UseNpgsql(configuration.GetConnectionString("DefaultConnection"))
          );

            services.AddTransient<IHostService, HostService>();
            services.AddTransient<IApplicationService, ApplicationService>();
            services.AddTransient<IApplicationTypeService, ApplicationTypeService>();
            services.AddTransient<IApplicationInHostService, ApplicationInHostService>();

            //services.AddTransient<IAreasInLayerService, AreasInLayerService>();
        }
    }
}