id like to add 7-zip functionality to my C# application, how would i do this?

Question

i currently have this code to extract a passworded 7zip SFX to the appdata location run it then clean up after its self, but i'm losing a lot of compression i think also would just like to learn how to do this, so id like to learn how to make it so my application can extract a .7z file without having 7-zip installed on the computer (the application is ment to be ran on computers without 7-zip) i know it has to do with adding some dll files and such but any more than that and i'm clueless lol, also it would be cool to see how to add UHARC archiving functionality as well, any ways here's my coding for the SFX's

            string tempFolder = Environment.GetFolderPath(Environment.SpecialFolder.ApplicationData);
        System.Diagnostics.Process defrag1 = System.Diagnostics.Process.Start(@"AusLogics_Defrag.exe", string.Format(" -o{0} -y -Pthisisthepass", tempFolder));
        defrag1.WaitForExit();
        string executableDirectoryName = Path.GetDirectoryName(Application.ExecutablePath);
        System.Diagnostics.Process defrag2 = System.Diagnostics.Process.Start(tempFolder + "\\" + "AusLogics_Defrag" + "\\" + "DiskDefrag.exe", "");
        defrag2.WaitForExit();
        System.IO.Directory.Delete(tempFolder + "\\" + "AusLogics_Defrag", true);

Answer 1

http://sevenzipsharp.codeplex.com/