Need help with adding openstaad reference to C# project

Hello,

I need help with adding openstaad reference to C# project. 

I did follow all instruction as per staad documentation. program is working on my system but not on client system.

I am using staad version 22 update 10.

One more thing, I am building VSTO Excel addin using C#. But process of adding staad reference should stay same i guess.

Let me know if anyone can help with this.