<ExtensionAttribute> _
Public Shared Function Aggregate(Of TSource, TAccumulate, TResult) ( _
    source As ParallelQuery(Of TSource), _
    seed As TAccumulate, _
    updateAccumulatorFunc As Func(Of TAccumulate, TSource, TAccumulate), _
    combineAccumulatorsFunc As Func(Of TAccumulate, TAccumulate, TAccumulate), _
    resultSelector As Func(Of TAccumulate, TResult) _
) As TResult

Dim source As ParallelQuery(Of TSource)
Dim seed As TAccumulate
Dim updateAccumulatorFunc As Func(Of TAccumulate, TSource, TAccumulate)
Dim combineAccumulatorsFunc As Func(Of TAccumulate, TAccumulate, TAccumulate)
Dim resultSelector As Func(Of TAccumulate, TResult)
Dim returnValue As TResult

returnValue = source.Aggregate(seed, _
    updateAccumulatorFunc, combineAccumulatorsFunc, _
    resultSelector)

public static TResult Aggregate<TSource, TAccumulate, TResult>(
    this ParallelQuery<TSource> source,
    TAccumulate seed,
    Func<TAccumulate, TSource, TAccumulate> updateAccumulatorFunc,
    Func<TAccumulate, TAccumulate, TAccumulate> combineAccumulatorsFunc,
    Func<TAccumulate, TResult> resultSelector
)

[ExtensionAttribute]
public:
generic<typename TSource, typename TAccumulate, typename TResult>
static TResult Aggregate(
    ParallelQuery<TSource>^ source, 
    TAccumulate seed, 
    Func<TAccumulate, TSource, TAccumulate>^ updateAccumulatorFunc, 
    Func<TAccumulate, TAccumulate, TAccumulate>^ combineAccumulatorsFunc, 
    Func<TAccumulate, TResult>^ resultSelector
)

static member Aggregate : 
        source:ParallelQuery<'TSource> * 
        seed:'TAccumulate * 
        updateAccumulatorFunc:Func<'TAccumulate, 'TSource, 'TAccumulate> * 
        combineAccumulatorsFunc:Func<'TAccumulate, 'TAccumulate, 'TAccumulate> * 
        resultSelector:Func<'TAccumulate, 'TResult> -> 'TResult