// Create a new VirtualFileSystem instance
var vfs = new VirtualFileSystem();

// Create a file stream for the zip archive and open it with System.IO.Compression's ZipArchive
var fileStream = new FileStream("archive.zip", FileMode.Open);
var archive = new ZipArchive(fileStream, ZipArchiveMode.Read);

// Add every entry from the archive into the VFS
// This already creates the folder structure
foreach (var entry in archive.Entries)
{
	vfs.Add(entry);
}  

var path = "C://";

// Create a new VirtualFileSystem instance
var vfs = new VirtualFileSystem();

// Iterate over every single file in the directory, recursively
foreach (var file in Directory.GetFiles(path, "*", SearchOption.AllDirectories))
{
	// Remove the actual root path part from the given path
	var relative = file.Replace(path, "");
	vfs.Add(file, relative);
}

foreach (var file in vfs.GetAllEntries())
{
	// Write out the path of every file
	Console.WriteLine($"{file.Path}");
}

foreach (var file in vfs.GetEntriesInDirectory("\\SomeDirectory"))
{
	Console.WriteLine($"{file.Name}");
}

var byteArray = vfs.ReadFile("\\SomeDirectory\\SomeFile.txt");
var text = vfs.ReadFileAsString("\\SomeDirectory\\SomeFile.txt");