用C#获取到驱动器的容量，检查驱动器的容量，获取磁盘的总容量和剩余容量，以字节为为单位，有兴趣的初学者可转换为M或G为单位-With C# get to the capacity of the drive, check the drive' s capacity, access to the disk' s total capacity and remaining capacity in bytes as a unit, interested beginners can be con