How would i use Sevenzipsharp with this code?

Question

iv tried numerous different ways to get this to work and i got it to basicly work but i cant get the WaitForExit(); 's to work like they do here... so how would i convert this to work with sevenzip? cause i cant get it to work, and also i the SFX's are passworded so that they cannot be accessed except by the use of the program and as for adding the 7z.DLL i cant add it in because i get the error:

A reference to 7za.dll could not be added. please make sure that the file is accessible, and that it is a valid assembly or COM component.

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);

new: ok well this is what i have so far but im getting that error "Can not load 7-zip library or internal COM error! Message: failed to load library"

SevenZipExtractor.SetLibraryPath("7z.dll"); //no idea of this is needed or not
SevenZipCompressor.SetLibraryPath("7z.dll"); //no idea of this is needed or not
string tempFolder = Environment.GerFolderPath(Environment.SpecialFolder.ApplicationData);
SevenZipExtractor defrag = new SevenZipExtractor(@"Programs\Optimize\Auslogics_Defrag.7z");
defrag.ExtracArchive(string.Format("-o{0} -y -PThisisthepass", tempFolder));

Answer 1

Reference SevenZipSharp.dll from you .NET project and make sure you have the 7z DLL copied to the target output directory as a post-build event. Since 7z.dll is not a .NET assembly your .NET project cannot reference it directly.

There are two typical explanations for "Can not load 7-zip library or internal COM error! Message: failed to load library":

1. The obvious is that the 7z DLL can't be found. In that case call SevenZipCompressor/SevenZipExtractor.SetLibraryPath() with the full path of the DLL before making any related SevenZipSharp calls. Relative paths should work as well but try the absolute in case some code changed the current directory of the process. One strategy to get the absolute path is to use the path of the executing assembly, see below for an example.

2. The architecture of the DLL being referenced doesn't match the current process. For example your .NET assembly is running x64 but you reference a 32-bit version of 7z.dll. In that case you would need to reference 7z64.dll. Download the 7-Zip DLL binaries from SevenZipSharp's release to ensure there are no other mismatch issues and make sure you're using the correct version.

Here is an example how to set the absolute path of the 7z.dll if it's in the same directory as the assembly using it:

SevenZip.SevenZipCompressor.SetLibraryPath(
    Path.Combine(
        Path.GetDirectoryName(Assembly.GetExecutingAssembly().Location),  
        "7z.dll"));