Adding a chat command?

I can't seem to figure out how to make a command without using a CovalencePlugin class.

 

This is how you would do it for rust

Code:

[ChatCommand("checknew")]
private void checkNewCmd(BasePlayer player, string command, string[] args)
{
//Magic goes here
}

 

I can't use the command?

 

What's exactly happening?
Multiple things could be causing this... Is the plugin compiling? Is the code inside that the command executes working? Is oxide installed properly?

 

Nvm, I fixed it, Thanks!