ApplicationBuilder.Run<MainForm>(container =>
{
container.Services.Register<IAnimalService, DogService>(InjectionType.Singleton);
container.Services.Register<IAnimalFoodService, DogFoodService>(InjectionType.Singleton);
container.Services.Register<SecondaryForm, SecondaryForm>(InjectionType.Singleton);
container.Services.Register<ThirdForm, ThirdForm>(InjectionType.Singleton);
});