C# scripting cannot use TriggerServerEvent

Hi, so I am doing some scripts to learn more about fivem scripting and for some reasons TriggerServerEvent doesn’t exist. I do not know if I should more directive using but I can use other triggerevents.
Thanks for the help
TriggerEvent

Make sure to inherit BaseScript on your class

BaseScript.TriggerServerEvent();

Hey, I aready have it but I still cannot use TriggerServerEvent.
I don’t know if I used the wrong .dll as a reference but I don’t think so

tried using TriggerEvent?

Yes but still doesn’t work

What using tags are you using and where are you getting your reference from?