Each NFile and NFolder instance is connected to an instance of the NFileSystem class. It represents an implementation of a specific file system. You can obtain an instance of the NFileSystem class via the NFileSystem.Current static property - it returns the default (current) file system for the current integration platform. The following table summarizes the types of file systems returns for each integration platform:

Platform	File System
WinForms	A file system implementation that works with the Windows file systems.
WPF	A file system implementation that works with the Windows file systems.
XamarinMac	A file system implementation that works with the macOS file systems.
Blazor	A file system implementation that works with the browser local storage.

Alternatively you can always create an in-memory file system via the NFileSystem.CreateMemoryFileSystem method.

Once you obtain a reference to the NFileSystem of interest you can get files and folders from it via the GetFile and GetFolder methods.