GitUI.Editor.FileViewer.ViewItem C# (CSharp) Method

        private void ViewItem(string fileName, Func<Image> getImage, Func<string> getFileText)
        {
            if (IsImage(fileName))
            {
                _async.Load(getImage,
                            image =>
                            {
                                ResetForImage();
                                if (image != null)
                                {
                                    if (image.Size.Height > PictureBox.Size.Height ||
                                        image.Size.Width > PictureBox.Size.Width)
                                    {
                                        PictureBox.SizeMode = PictureBoxSizeMode.Zoom;
                                    }
                                    else
                                    {
                                        PictureBox.SizeMode = PictureBoxSizeMode.CenterImage;
                                    }

                                }
                                PictureBox.Image = image;
                            });
            }
            else if (IsBinaryFile(fileName))
            {
                ViewText(null, "Binary file: " + fileName);
            }
            else
            {
                _async.Load(getFileText, text => ViewText(fileName, text));
            }
        }