How to add AppInsights into Class Library

I went through the following tutorial to add AppInsights into a C# project

https://learn.microsoft.com/en-us/azure/azure-monitor/app/asp-net

Using the manual method. All worked as expected.

I now want to add this same feature into a .Net Framework Class Library.

Following that tutorial I can't carry out steps 5 and 6 because they are explicitly used in an MVC project.

How could I add or what is the equivalent code for steps 5 and 6 from that link to add the same code into a .Net Framework Class Library?

Edit 1

So after implementing the manual method in an MVC app all looks good.

In my Class Library in the constructor i have added similar code as below

private TelemetryClient _telClient;

public class SomeClass(TelemetryClient telClient)
{
    _telClient = new TelemetryClient();
}

public void SomeMethod()
{
    _telClient.TrackException(new Exception("Hello World");
}

In my MVC app i have the below code

 if (filterContext != null && filterContext.HttpContext != null && filterContext.Exception != null)
            {
                //If customError is Off, then AI HTTPModule will report the exception
                if (filterContext.HttpContext.IsCustomErrorEnabled)
                {   
                    var ai = new TelemetryClient();
                    ai.TrackException(filterContext.Exception);
                    SomeClass sc = new SomeClass(ai);
                } 
            }

For a .Net Framework Class library you should only expect a TelemetryClient (or a TelemetryConfiguration so you can create a TelemetryClient) to be passed to the constructor using a constructor argument or dependency injection.

Typically the reading the ApplicationInsights.config file and constructing a client is done by the code that calls your class library. You shouldn't do that in the class library itself.

Then, in your class library you can manually call the methods of the TelemetryClient like TrackEvent(..), TrackException(...), TrackDependency(...) etc.

Steps 5 and 6 take care of tracking unhandled exceptions on a controller level. You cannot do that in a class library unless you want to provide an exception handler to the calling code.

So, unless you want to manually send telemetry from within your class library you shouldn't bothered about Application Insights at all in your class library.