Amazon EC2 API和Windows实例——任何获得驱动器字母分配的方法?

I have Windows EC2 instances that I am managing via a C# application; I'm using the AWS.NET SDK. I'm trying to figure out from the documentation if there is anyway to query the API and get the volume-to-drive letter assignment within the instances. Failing that, does anyone know if EC2 is consistent in its mapping of devicenames (e.g. /dev/sdb, /dev/sdc) to drive letter? Will /dev/sdb always be D, /dev/sdc always be E, etc.?I have Windows EC2 instances that I am managing