ManiulationDrawer demo view model and model

MainViewModel.cs

using System.Collections.ObjectModel;
using System.ComponentModel;
using System.Runtime.CompilerServices;
using DetailsDrawer.Annotations;

namespace DetailsDrawer.ViewModels
{
    public class MainPageViewModel : INotifyPropertyChanged
    {
        private ObservableCollection<RouteStep> routeSteps;
        
        public ObservableCollection<RouteStep> RouteSteps
        {
            get { return routeSteps ?? (routeSteps = LoadSampleSteps()); }
            set { routeSteps = value; OnPropertyChanged();}
        }

        private ObservableCollection<RouteStep> LoadSampleSteps()
        {
            return new ObservableCollection<RouteStep>()
            {
                new RouteStep() {Icon = "M20,11V13H8L13.5,18.5L12.08,19.92L4.16,12L12.08,4.08L13.5,5.5L8,11H20Z", Summary = "Turn left onto Main St in 500 feet"},
                new RouteStep() {Icon = "M4,11V13H16L10.5,18.5L11.92,19.92L19.84,12L11.92,4.08L10.5,5.5L16,11H4Z", Summary = "Turn right onto Broadway in 75 feet"},
                new RouteStep() {Icon = "M13,20H11V8L5.5,13.5L4.08,12.08L12,4.16L19.92,12.08L18.5,13.5L13,8V20Z", Summary = "Go straight on Broadway in 1/4 mile"},
                new RouteStep() {Icon = "M14.4,6H20V16H13L12.6,14H7V21H5V4H14L14.4,6M14,14H16V12H18V10H16V8H14V10L13,8V6H11V8H9V6H7V8H9V10H7V12H9V10H11V12H13V10L14,12V14M11,10V8H13V10H11M14,10H16V12H14V10Z", Summary = "Destination"}
            };
        }

        #region INPC
        
        public event PropertyChangedEventHandler PropertyChanged;

        protected virtual void OnPropertyChanged([CallerMemberName] string propertyName = null)
        {
            PropertyChanged?.Invoke(this, new PropertyChangedEventArgs(propertyName));
        }

        #endregion
    }

    public class RouteStep
    {
        public string Icon { get; set; }
        public string Summary { get; set; }
    }
}