BricsCAD does not load "Hello world"

Problem

BricsCAD does not show the command after loading the assembly with NETLOAD.

[CommandMethod("Go")]
public void Go()
{
    MessageBox.Show("Hello world");
}

Solution

There is no API call in this file.
At least one command has to do something with the BricsCAD API. E.g write something to the console, open a transaction or just update the screen.

[CommandMethod("Go")]
public void Go()
{
    MessageBox.Show("Hello world");
    Bricscad.ApplicationServices.Application.UpdateScreen();
}