Visual D IntelliSense not working

[Shadowblitz16]

can someone explain to me why the visual D IntelliSense is not 
working for me?

I am using visual studio 2019

and I have installed visual d from here 
https://rainers.github.io/visuald/visuald/StartPage.html

I would expect something like what it does with C# where when you 
attempt to write something it shows what is available.

here is a example of my code..

module DTest3;

import std.stdio;

int main()
{
     writeln("Hello D World!\n");
	readln();
	w
     return 0;
}