IReadByIdsResult<T> ReadByIds<T>(
	IdsQuery<T> idsQuery,
	ITransaction tx
)

Function ReadByIds(Of T) ( _
	idsQuery As IdsQuery(Of T), _
	tx As ITransaction _
) As IReadByIdsResult(Of T)

generic<typename T>
IReadByIdsResult<T>^ ReadByIds(
	IdsQuery<T> idsQuery, 
	ITransaction^ tx
)

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