PowerShell and C# - Custom Object

I am not a Big Fan of C# and was exploring the Blue shell today. Was alone in room, Roommate was not there  and was thinking can I copy a C# code from net and execute it in PowerShell and with luck was successfully execute it.PowerShell is faster to write, and deploy..!!

I have copy the code to find the factorial of a number from Web and then create a new object $kali

The Output 

I am done for today time to have some Beer..!!!