在.NET中查找总磁盘空间和可用磁盘空间

I am trying to find a way to determine the total and available disk space in an arbitrary folder from a .NET app. By "total disk space" and "available disk space" in a folder I refer to the total and available disk space that this folder would report if you performed a "dir" command on it, that is, the total and available disk space of the logical drive containing that folder, considering the user account under which the request is being made.I am trying to find a way to determine the tota