Zip files (compress, extract)

Use class ZipFile.

string zipFile = @"C:\Test\Z.zip";
//filesystem.delete(zipFile);

Create zip file from folder.

ZipFile.CreateFromDirectory(@"C:\Test\Folder", zipFile);
ZipFile.CreateFromDirectory(@"C:\Test\Folder", zipFile, CompressionLevel.Fastest, includeBaseDirectory: true);

Extract zip file.

ZipFile.ExtractToDirectory(zipFile, @"C:\Test\Folder2");

Create zip file from single file.

string file = @"C:\Test\sqlite.db";
using (var z = ZipFile.Open(zipFile, ZipArchiveMode.Create))
	z.CreateEntryFromFile(file, pathname.getName(file));

Create zip file and add db files from folder.

using (var z = ZipFile.Open(zipFile, ZipArchiveMode.Create)) {
	foreach (var f in filesystem.enumFiles(@"C:\Test", "*.db"))
		z.CreateEntryFromFile(f.FullPath, f.Name);
}

Create zip file from folder. Don't include subfolders protected and ico.

using (var z = ZipFile.Open(zipFile, ZipArchiveMode.Create)) {
	foreach (var f in filesystem.enumerate(@"C:\Test\Folder", FEFlags.NeedRelativePaths, dirFilter: d => d.Name.Ends(true, @"\protected", @"\ico") > 0 ? 0 : 2)) {
		//print.it(f.Name);
		z.CreateEntryFromFile(f.FullPath, f.Name[1..].Replace('\\', '/'));
	}
}

Create zip file and add files/folders specified in a list or array.

string list = @"
C:\Test\sqlite.db
C:\Test\Folder";
string[] a = list.Lines(noEmpty: true);
using (var z = ZipFile.Open(zipFile, ZipArchiveMode.Create)) {
	foreach (var f in a) {
		switch (filesystem.exists(f)) {
		case 1: //file
			z.CreateEntryFromFile(f, pathname.getName(f));
			break;
		case 2: //folder
			foreach (var k in filesystem.enumFiles(f, flags: FEFlags.AllDescendants | FEFlags.NeedRelativePaths))
				z.CreateEntryFromFile(k.FullPath, k.Name[1..].Replace('\\', '/'));
			break;
		default:
			print.warning("file not found: " + f);
			break;
		}
	}
}

List/find/extract zip file entries.

using (var z = ZipFile.OpenRead(zipFile)) {
	foreach (var e in z.Entries) {
		print.it(e.Name, e.FullName, e.Length, e.CompressedLength);
		if(e.Name.Eqi("m.txt")) {
			//var s = @"C:\Test\Extracted\" + e.Name; //extract all to the same folder
			var s = @"C:\Test\Extracted\" + e.FullName; //create subfolders if need
			filesystem.createDirectoryFor(s);
			e.ExtractToFile(s, overwrite: true);
		}
	}
}

If need other compression formats or more features, look for a zip library on the internet, for example in NuGet. More info in recipe Using .NET, NuGet, other libraries.

Also you can find command line programs on the internet, or even already have them installed.

string file1 = @"C:\Test\icons.db";
var file2 = @"C:\Test\icons.7z";
run.console(folders.ProgramFiles + @"7-Zip\7z.exe", $@"a ""{file2}"" ""{file1}""");