IAggregationResult Aggregate<T>(
	IQuery<T> query,
	AggregationSet aggregationSet
)

Function Aggregate(Of T) ( _
	query As IQuery(Of T), _
	aggregationSet As AggregationSet _
) As IAggregationResult

generic<typename T>
IAggregationResult^ Aggregate(
	IQuery<T>^ query, 
	AggregationSet^ aggregationSet
)

J# supports the use of generic APIs, but not the declaration of new ones.