Check a small script for trading on the stock exchange for malware

I ordered a programmer to write a small program, a script for trading on the stock exchange. The program is written in C#, you need to check it for viruses, or other malware. You also need to make sure that the API keys go only to the exchange and this data does not go to the attackers. In addition, Defender Windows and some other antiviruses see rojan in it. Malware.300983.susgen

There is source code.