private void InitCommands()
        {
            RemoveGoodCommand = new RelayCommand(x =>
            {
                goodService.Remove(SelectedGood);
                Goods.Remove(SelectedGood);
            });

            RemoveCategoryCommand = new RelayCommand(x =>
            {
                categoryService.Remove(SelectedCategory);
                Categories.Remove(SelectedCategory);
            });

            RemoveManufacturerCommand = new RelayCommand(x =>
            {
                manufacturerService.Remove(SelectedManufactirer);
                Manufacturers.Remove(SelectedManufactirer);
            });

            AddUpdateGoodCommand = new RelayCommand(x =>
            {
                AddUpdateGood dlg = new AddUpdateGood();
                dlg.ShowDialog();
                var good = new GoodDTO
                {
                    GoodName       = GoodViewModelProxy.Proxy.GoodName,
                    GoodCount      = GoodViewModelProxy.Proxy.GoodCount,
                    Price          = GoodViewModelProxy.Proxy.GoodPrice,
                    CategoryId     = categoryService.GetAll().FirstOrDefault(y => y.CategoryName == GoodViewModelProxy.Proxy.GoodCategory).CategoryId,
                    ManufacturerId = manufacturerService.GetAll().FirstOrDefault(y => y.ManufacturerName == GoodViewModelProxy.Proxy.GoodManufacturer).ManufacturerId
                };
                var result = goodService.CreateOrUpdate(good);
                Goods.Add(result);
            });

            AddUpdateCategoryCommand = new RelayCommand(x =>
            {
                AddUpdateCategoryView dlg = new AddUpdateCategoryView();
                dlg.ShowDialog();
                var category = new CategoryDTO
                {
                    CategoryName = CategoryViewModelProxy.Proxy.CategoryName
                };
                var result = categoryService.CreateOrUpdate(category);
                Categories.Add(result);
            });

            AddUpdateManufacturerCommand = new RelayCommand(x =>
            {
                AddUpdateManufactorerView dlg = new AddUpdateManufactorerView();
                dlg.ShowDialog();
                var manufactorer = new ManufacturerDTO
                {
                    ManufacturerName = ManufacturerModelProxy.Proxy.ManufacturerName
                };
                var result = manufacturerService.CreateOrUpdate(manufactorer);
                Manufacturers.Add(result);
            });
        }