public static IAggregateFluent<TNewResult> Group<TResult, TKey, TNewResult>(
	this IAggregateFluent<TResult> aggregate,
	Expression<Func<TResult, TKey>> id,
	Expression<Func<IGrouping<TKey, TResult>, TNewResult>> group
)

<ExtensionAttribute>
Public Shared Function Group(Of TResult, TKey, TNewResult) ( 
	aggregate As IAggregateFluent(Of TResult),
	id As Expression(Of Func(Of TResult, TKey)),
	group As Expression(Of Func(Of IGrouping(Of TKey, TResult), TNewResult))
) As IAggregateFluent(Of TNewResult)

[<ExtensionAttribute>]
static member Group : 
        aggregate : IAggregateFluent<'TResult> * 
        id : Expression<Func<'TResult, 'TKey>> * 
        group : Expression<Func<IGrouping<'TKey, 'TResult>, 'TNewResult>> -> IAggregateFluent<'TNewResult>