In a ColorStopCollection, there must be at least two ColorStops, with a Stop value of 0 and 1. These represent the start and end colors of the gradient.
Target Platforms: Windows 10, Windows 8.1, Windows 8, Windows 7, Windows Vista SP1 or later, Windows XP SP3, Windows Server 2008 (Server Core not supported), Windows Server 2008 R2 (Server Core supported with SP1 or later), Windows Server 2003 SP2