Static variables not initialized

public static class CarService
{
    private static ICarRepository _carRepository = RepositoryFactory.GetInstance().GetRepository(typeof(ICarRepository)) as ICarRepository  
    
    public static bool MethodA()
    {
        if (MethodB == true)
               _carRepository.DoCRUD();

        Method();
    }

    public static bool MethodB()
    {
        //Do something
    }

    public static void MethodC()
    {
        //Do something
    }

}

//Arrange
Isolate.CleanUp();
Type carRepositoryType = typeof(CarRepository);
RepositoryFactory fakeFactory = Isolate.Fake.Instance<RepositoryFactory>(Members.ReturnRecursiveFakes);
Isolate.Swap.AllInstances<RepositoryFactory>().With(fakeFactory);
            
fakeCarRepository = Isolate.Fake.Instance<CarRepository>(Members.ReturnRecursiveFakes);
Isolate.WhenCalled(() => fakeFactory.GetRepository(carRepositoryType )).WillReturn(fakeCarRepository );           
Isolate.Swap.AllInstances<CarRepository>().With(fakeCarRepository );

Isolate.WhenCalled(() => CarService. MethodB().WillReturn(true);            
Isolate.WhenCalled(() => CarService. MethodC().IgnoreCall();
Isolate.WhenCalled(() => mockCarRepository. DoCRUD()). IgnoreCall();

//Act
CarService. MethodA();