Question about Compression technique in C#

Hello,

 

I converted VB logic into C# but I got a performance issue with C# program. Previous logic (VB) used Microsoft. Deployment. Compression. ZIP library for Archiving the files. I used the system. IO. Compression & Microsoft. Deployment. Compression libraries in C#. Now, my program is taking 3 more minutes than older program (VB). Still wondering what went wrong. If anyone has suggestions, please let me know.

 

 

Thanks in advance!