>The links I've found in a quick Google imply you need to temporarily map a local drive letter to the share, then you can get information e.g. http://stackoverflow.com/questions/1799984/finding-out-total-and-free-disk-space-in-net

Ah, that would make sense. However, this is something I cannot do. So, for as long as we don't have this support in .NET, one way would then be to use a 3rd party tool.

Thanks