What reference do I need to include in order to make Cortana integration work?

[rfalanga]

I've just finished what I believe is module 79, integrating Cortana into a UWP app. It failed pretty badly. Following Bob Tabor's example, I put the following code into the constructor of the App class in App.xaml.cs:

public App()
{
 Microsoft.ApplicationInsights.WindowsAppInitializer.InitializeAsync(
  Microsoft.ApplicationInsights.WindowsCollectors.Metadata |
  Microsoft.ApplicationInsights.WindowsCollectors.Session);
 this.InitializeComponent();
 this.Suspending += OnSuspending;
}

Visual Studio does not like that code at all! Especially it doesn't like the Microsoft.ApplicationInsights... I've got a red squiggly line under all three in the above code. What am I missing? My guess is a reference but I've no idea what the reference is.

[rfalanga]

This is a follow-up, which I hope will bring to light more of what is going on with the problem I'm having with Microsoft.ApplicationInsights.

I tried again to figure out what's causing this error and found it generated the following:

CS0234 The type or namespace name 'ApplicationInsights' does not exist in the namespace 'Microsoft' (are you missing an assembly reference?)

So I then tried to look for an assembly related to ApplicationInsights and I came across this one called Microsoft.VisualStudio.ApplicationInsights.Interfaces. I tried to include that, but it failed. So now I'm wondering if the failure to include Microsoft.VisualStudio.ApplicationInsights.Interfaces is because I'm using VS 2017? I'm guessing its a Core project and when Bob Tabor was doing these videos he was using VS 2015. So, I can't include Microsoft.VisualStudio.ApplicationInsights.Interfaces.

That takes me back to the error, "The type or namespace name 'ApplicationInsights' does not exist in the namespace 'Microsoft'". What is causing that?