CombineVariantsInLineItemDiscountMode Property (StoreSettingsManager)
Gets or sets a value indicating whether variants are always treated as a single product
in line item mode. If false, variants are treated as separate products.
Target Platforms: 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