Read raster data coordinate system / spatial reference

I'm trying to read raster datasets off disk and print out details including what coordinate system the data is in.

I'm currently using the Geoprocessor to read off various details including the extent of the data but can't find a way retrieving the coordinate system of data.

Any ideas how I can obtain this information, I would have thought is would be fairly straightforward but can't find any way of doing it?

Thanks

Steve