How to Zip and Unzip a file from folder without using opensource in c#

i would like to share the code to zip and unzip a file without using any opensource which is directly used reference file in dot net framework.

Please add the reference file to ZipFile is contained in the assembly System.IO.Compression.FileSystem.

To zip a file  

 System.IO.Compression.ZipFile.CreateFromDirectory(startPath, zipPath);

To UnZip a File

 System.IO.Compression.ZipFile.ExtractToDirectory(startPath, extractPath);he reference file to ZipFile is contained in the assembly System.IO.Compression.FileSystem.