Hi Chris and Tony.
This is possible, but you have to get the picture file object to find the meta tags associated to it. You could do it like this:
UnifiedFile file = HostingEnvironment.VirtualPathProvider.GetFile("PathToFile") as UnifiedFile;
if (file != null && file.Summary.Dictionary.Contains("Description"))
{
string altText = file.Summary.Dictionary["Description"].ToString();
}
Hope this helps!
Br, Tore