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namespace ReactiveToDoSample
{
    public class RxExceptionHandler : IObserver<Exception>
    {
        public void OnNext(Exception ex)
        {
            if (Debugger.IsAttached)
            {
                Debugger.Break();
            }

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namespace ReactiveToDoSample.ViewModels
{
    public abstract class ViewModelBase : ReactiveObject, IDisposable, INavigable
    {
        protected ViewModelBase(IParameterViewStackService viewStackService) => NavigationService = viewStackService;

        public abstract string Id { get; }

        public virtual IObservable<Unit> WhenNavigatedFrom(INavigationParameter parameter) => Observable.Return(Unit.Default);

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<?xml version="1.0" encoding="UTF-8"?>
<ContentPage xmlns="http://xamarin.com/schemas/2014/forms"
             xmlns:x="http://schemas.microsoft.com/winfx/2009/xaml"
             x:Class="DynamicDataGroupingSample.NotificationConfigurationsPage"
             Title="Notification Settings">
    <CollectionView ItemsSource="{Binding NotificationGroups}"
                    IsGrouped="True">
         <CollectionView.GroupHeaderTemplate>
            <DataTemplate>
                <Label Padding="10"

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namespace DynamicDataGroupingSample
{
    public class NotificationConfigurationViewModel : ReactiveObjectEx 
    {
        public NotificationConfigurationViewModel()
        {
            ...
            
            var smsChannelChangedCommand = ReactiveCommand.CreateFromTask<NotificationConfiguration>(OnSmsChannelChanged);
            var emailChannelChangedCommand = ReactiveCommand.CreateFromTask<NotificationConfiguration>(OnEmailChannelChanged);

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using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Reactive.Disposables;
using System.Reactive.Linq;
using DynamicData;
using DynamicData.Binding;
using ReactiveUI;

namespace DynamicDataGroupingSample

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namespace DynamicDataGroupingSample
{
    public class NotificationConfigurationViewModel : ReactiveObjectEx 
    {
        public NotificationConfigurationViewModel()
        {
            _notificationConfigurationsSourceCache.AddOrUpdate(new List<NotificationConfiguration>()
            {
                new NotificationConfiguration("Information", 0,"Development", 0,false, false, true, false),
                new NotificationConfiguration("Status Changed", 1,"Administration", 1, false, true, false, false),

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using System;
using System.Reactive.Disposables;
using ReactiveUI;

namespace DynamicDataGroupingSample
{
    public abstract class ReactiveObjectEx : ReactiveObject, IDisposable
    {
        /// <summary>
        /// Performs application-defined tasks associated with freeing, releasing, or resetting unmanaged resources.

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using ReactiveUI;

namespace DynamicDataGroupingSample
{
    public class NotificationConfiguration : ReactiveObjectEx
    {
        public NotificationConfiguration(string name, int order, string groupName, int groupOrder,bool smsChannel, bool emailChannel, bool pushNotificationChannel, bool phoneChannel)
        {
            Name = name;
            Order = order;

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namespace App
{
    public partial class ExtendedMap : Map
    {
        public static readonly BindableProperty TappedCommandProperty =
       BindableProperty.Create(nameof(TappedCommand), typeof(DelegateCommand<object>), typeof(ExtendedMap), default(DelegateCommand<object>));

        public DelegateCommand<object> TappedCommand
        {
            get { return (DelegateCommand<object>)GetValue(TappedCommandProperty); }

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mBraintreeFragment = BraintreeFragment.NewInstance((AppCompatActivity)CrossCurrentActivity.Current.Activity, clientToken);