C# .Net 3.5 Unzip zip file no 3rd party

Question

I am writing a Winform application in .NET 3.5, and I need unzip a .rar or .zip file.
I found many things, but I didn\'t found none 3rd party. I couldn\'t change to .NET 4

Answer 1

Actually, .NET 3.5 does .zip files using the DeflateStream. You have to handle the headers yourself, but PKWare has published the specification and you can create structs and use Streams.

There is no need of third party code…but, you do have to approach it in a more traditional, old school manner. They don't exactly unzip themselves.