public CustomImagePickerViewModel()
        {
            var resourceService = DependencyService.Get <IResourceService>();

            this.RecipientsItemSource = new List <string>
            {
                "BrandonPeterson",
                "VacationWander",
                "Joshua Price",
                "Reuben Holmes",
                "Eva Lawson",
                "Rory Baxter",
                "David Webb",
                "Howard Pittman",
            };
            this.Source = RichTextSource.FromStream(() => resourceService.GetResourceStream("pick-image-demo.html"));
            //this.EmojiSource =
            this.EmojiSource = resourceService
                               .GetResourceNamesFromFolder("Emojis")
                               .OrderBy(resourceName => resourceName)
                               .Select(resourceName => RichTextImageSource.FromStream(() =>
                                                                                      resourceService.GetResourceStream(resourceName), RichTextImageType.Png))
                               .ToList();


            this.SendEmailCommand = new Command(SendEmail);
        }
        // >> rte-custom-image-picker-add-images-to-picker-toolbar-item
        private void InitializeImages()
        {
            var resourceNames = this.currentAssembly.GetManifestResourceNames();
            var imageSources  = new List <RichTextImageSource>();

            foreach (var resourceName in resourceNames)
            {
                if (resourceName.Contains("emoji"))
                {
                    var imageSource = RichTextImageSource.FromStream(() =>
                                                                     this.currentAssembly.GetManifestResourceStream(resourceName), RichTextImageType.Png);

                    imageSources.Add(imageSource);
                }
            }

            this.imagePicker.ItemsSource = imageSources;
        }