✏️ Explanatory Question
You have several options.
Create a main method on your class with the following signature:
static void main (Args _args)
{
// Your X++ code here.
}
You can execute this method by pressing F5 when the class is open in the code editor. Be aware that this method gets invoked when a class is associated with a menu item, so not all production classes will need this method. Works great for testing though.