Unmanaged resources in a static class

I have a static class that holds quite a few unmanaged
resources (it
basically loads/creates a large number of GDI+ bitmaps,
brushes and pens
that are likely to be used at regular intervals by the
application). Being
concerned about resource cleanup, I naturally (  ) thought
about their
disposal. However, static classes do not allow finalizers to
be defined.

In one sense that makes sense - the reason for having a
static class that
manages these resources is that they are likely to be
required repeatedly
right up until the app shuts down. However I am a bit
nervous - this means
I'm entirely dependant on Windows to release all these
resources when the
process ends, and although Windows should do that, to be
honest I'm not
100% sure I trust it to do so, I'd feel more comfortable if
my managed
code contained something to explicitly ensure these
resources are
released. (I trust .NET rather more than I trust the Windows
OS  )

Any thoughts? Am I being too cautious when I should just
trust Windows to
handle resource release, or is there some other way to deal
with this
situation?

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