Microsoft.Windows.Controls.ColorPicker.UpdateRecentColors C# (CSharp) Method

        private void UpdateRecentColors(ColorItem colorItem)
        {
            if (!RecentColors.Contains(colorItem))
                RecentColors.Add(colorItem);

            if (RecentColors.Count > 10) //don't allow more than ten, maybe make a property that can be set by the user.
                RecentColors.RemoveAt(0);
        }