When execution returns from the AggregateMeasure event, the value of this property is evaluated to determine whether it can be successfully converted to the type returned by the associated MeasureDescriptor's DataType property.
If conversion to that type is not possible, an exception is thrown. This validation can be bypassed by setting the Validate property to false; note, however, that this does not prevent any other exceptions from being thrown, it only prevents the type check from taking place.
Target Platforms: Windows 10, Windows 8.1, Windows 8, Windows 7, Windows Server 2012, 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