private void picture_Click(object sender, EventArgs e) { PictureBox picture = (PictureBox)sender; if (picture.Image == null) { return; } zoom.pictureZoom.Image = picture.Image; zoom.pictureZoom.Left = 0; zoom.pictureZoom.Top = 0; zoom.pictureZoom.Width = picture.Image.Width; zoom.pictureZoom.Height = picture.Image.Height; zoom.pictureZoom.SizeMode = PictureBoxSizeMode.Zoom; zoom.pictureZoom.Dock = DockStyle.Fill; zoom.ShowDialog(); }