// When user picks a photo, add it to TextView
        void PhotoViewController_ImageSelected(object sender, PhotoEventArgs e)
        {
            var image = e.Image;

            // Get the location where we are going to insert the image
            var cursorLocation = TxtContent.SelectedRange.Location;

            // Resize the image if it's to big, to display it nicely in TextView
            nfloat sideLimit = UIScreen.MainScreen.Bounds.Width - 10;

            if (!VerifyImageSides(image, sideLimit))
            {
                image = ResizeImage(image, sideLimit);
            }

            // Save image location to update it if user types more text later.
            Note.ImagesInfo.Add(new ImageInfo {
                Id       = e.ImageId,
                Location = cursorLocation
            });

            // Save the image in Firebase Storage
            SaveImageToStorage(e.ImageId, e.Image);
            // Save image in disk to load it in TextView more quickly
            SaveImageToDisk(e.ImageId, e.Image);

            // Insert image in TextView, adding 1 to text length
            InsertImageInText(TxtContent, e.ImageId, image, cursorLocation, false);

            // If text have an image after this location, we need to add 1 to their locations
            // because we have just inserted 1 char to text
            UpdateImagesLocation(cursorLocation, 1);
        }
        public override void ItemSelected(UICollectionView collectionView, NSIndexPath indexPath)
        {
            var cell = collectionView.CellForItem(indexPath) as PhotoCell;

            if (cell != null)
            {
                var asset = images [indexPath.Item] as PHAsset;
                imageManager.RequestImageForAsset(asset, PHImageManager.MaximumSize, PHImageContentMode.AspectFill, null, (result, info) => {
                    var args = new PhotoEventArgs {
                        Image   = result,
                        ImageId = AppDelegate.GetUtcTimestamp().ToString()
                    };

                    ImageSelected?.Invoke(this, args);
                    DismissViewController(true, null);
                });
            }
            else
            {
                RequestAccessToPhotoLibrary();
            }
        }