Updating the WalksMainPageViewModel using C#

Now that we have updated our BaseViewModel class to reference our NavigationService class, which will be used and inherited by each of the ViewModels that we create, we can now proceed and start updating the WalksMainPageViewModel class so that it can use our navigation service.

Let's take a look at how we can achieve this by following these steps:

1. Ensure that the TrackMyWalks solution is open within the Visual Studio for Mac IDE.
2. Open the WalksMainPageViewModel.cs class, ensuring that it is displayed within the code editor, and enter the following highlighted code sections within the code snippet:

     //
     //  WalksMainPageViewModel.cs
     //  The ViewModel for our WalksMainPage ContentPage
     //
     //  Created by Steven F. Daniel on 5/06/2018.
     //  Copyright © 2018 GENIESOFT STUDIOS. All rights reserved.
     //
     using System.Collections.ObjectModel;
     using System.Threading.Tasks;
     using TrackMyWalks.Models;
using TrackMyWalks...