Cleaning existing images in PersonPicture WinRT/C++

Question

In my application, there are two functions to add and clean image in PersonPicture. However, I don't know of a way to clean up the image that has been added in the PersonPicture. So, how to clean the image that has been added in the PersonPicture?

Example of the code.

// Xaml file
<PersonPicture x:Name="UserProfile"/>

// Cpp file
void MyPage::AddImage(hstring const& path)
{
    Windows::UI::Xaml::Media::Imaging::BitmapImage bitmap{ Windows::Foundation::Uri(path) };
    UserProfile().ProfilePicture(bitmap);
}

void MyPage::ClearImage()
{
    // Clean up the image that has been added in PersonPicture.
    // However,
    // How to do that here?
}