System.Windows.Forms.CommandBar.UpdateImageList C# (CSharp) Method

        private void UpdateImageList()
        {
            IntPtr handle = IntPtr.Zero;
            if (this.Style != CommandBarStyle.Menu)
            {
                Size size = new Size(8, 8);
                for (int i = 0; i < items.Count; i++)
                {
                    Image image = items[i].Image;
                    if (image != null)
                    {
                        if (image.Width > size.Width)
                        {
                            size.Width = image.Width;
                        }
                        if (image.Height > size.Height)
                        {
                            size.Height = image.Height;
                        }
                    }
                }

                Image[] images = new Image[items.Count];
                for (int i = 0; i < items.Count; i++)
                {
                    Image image = items[i].Image;
                    images[i] = (image != null) ? image : new Bitmap(size.Width, size.Height);
                }

                if (this.imageList == null)
                {
                    this.imageList = new ImageList();
                    this.imageList.ImageSize = size;
                    this.imageList.ColorDepth = ColorDepth.Depth32Bit;

                    for (int i = 0; i < images.Length; i++)
                    {
                        this.imageList.Images.Add(images[i]);
                    }
                }
                else if (this.imageList.Images.Count == images.Length)
                {
                    for (int i = 0; i < images.Length; i++)
                    {
                        this.imageList.Images[i] = images[i];
                    }
                }
                else
                {
                    this.imageList.Images.Clear();
                    this.imageList.ImageSize = size;

                    for (int i = 0; i < images.Length; i++)
                    {
                        this.imageList.Images.Add(images[i]);
                    }
                }

                handle = this.imageList.Handle;
            }

            NativeMethods.SendMessage(this.Handle, NativeMethods.TB_SETIMAGELIST, 0, handle);
        }