Thanks for your reply. Seems like my code needs some fixes to run faster )

I assume every of the test sandboxes are having the same timeout value which is 6 seconds.
This is from the docs of .Net environment:
"The sandbox environment will timeout the code within 6 seconds. In the future, as Codewars expands its abilities, this limitation may be increased in order to handle more complex kata/code challenges."

I've got minor issue while solving this kata. The thing is that code seems working and executing well but the system says: "Process was terminated. It took longer than 6000ms to complete". Is there code speed test as well ?