SewerGenerator/SewerStammGen/HostBuilders/AddViewModelsHostBuilderExtensions.cs

using Microsoft.Extensions.DependencyInjection;
using Microsoft.Extensions.Hosting;
using SewerStammGen.WPF.Interface;
using SewerStammGen.WPF.ViewModel;
using SewerStammGen.WPF.ViewModel.Factories;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Net.Security;
using System.Text;
using System.Threading.Tasks;

namespace SewerStammGen.HostBuilders
{
    static class AddViewModelsHostBuilderExtensions
    {
        public static IHostBuilder AddViewModels(this IHostBuilder hostBuilder)
        {
            hostBuilder.ConfigureServices(services =>
            {
                services.AddTransient<MainWindowViewModel>();
                services.AddSingleton<CreateViewModel<HomeViewModel>>(services =>
                {
                    return () => new HomeViewModel();
                });

                services.AddSingleton<CreateViewModel<EditManHoleViewModel>>(services =>
                {
                    return () => new EditManHoleViewModel();
                });

                services.AddSingleton<CreateViewModel<SewerConnectorViewModel>>(services =>
                {
                    return () => new SewerConnectorViewModel();
                });

                services.AddSingleton<CreateViewModel<ProjektListViewModel>>(services =>
                {
                    return () => new ProjektListViewModel();
                });

                services.AddSingleton<IViewModelAbstractFactory, MainWindowViewModelFactory>();
            });

            return hostBuilder;
        }
    }
}