Sometimes we might need to write a renderer in order to use features that are not available in the Xamarin.Forms framework. One example of that is App Links.

App Links is a way to link our app with other apps or to handle our app's incoming links. Let's develop a solution that allows us to insert a phone number inside our app and make a call with the Skype app when installed in the user device.

In our CustomRenderers core project, we can create a new Content page that contains an entry box to insert the phone number and a button that will redirect us to the Skype app.

We will also create an event that will transform the click on the button as a Call event, passing the phone number to call:

public class SkypeCallPage : ContentPage 
{ 
    public event CallHandler Call; 
 
    public delegate void CallHandler (string number); 
 
    public void OnCall (string number) 
    { 
        if (Call != null) { 
            Call (number)...