I like to zip multiple files which are being created dynamically in my web application. Those files should be zipped. For this, i dont want to use any third-party tools. just like to use .net api in c#
8 Answers
Use System.IO.Packaging in .NET 3.0+.
See this introduction to System.IO.Packaging
If you're able to take a .NET 4.5 dependency, there's a System.IO.Compression.ZipArchive in that universe; see walkthrough article here (via InfoQ news summary article here)
I'm not sure what you mean by not wanting to use thrid party tools, but I assume its that you don't want some nasty interop to programmatically do it through another piece of software.
I recommend using ICSharpCode SharpZipLib
This can be added to your project as a reference DLL and is fairly straightforward for creating ZIP files and reading them.
Check out System.IO.Compression.DeflateStream. The linked documentation page also offers an example.
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