public static IQueryable<TResult> HashPartition<TSource, TKey, TResult>(
	this IQueryable<TSource> source,
	Expression<Func<TSource, TKey>> keySelector,
	IEqualityComparer<TKey> comparer,
	Expression<Func<TSource, TResult>> resultSelector
)

<ExtensionAttribute> 
Public Shared Function HashPartition(Of TSource, TKey, TResult) ( 
	source As IQueryable(Of TSource),
	keySelector As Expression(Of Func(Of TSource, TKey)),
	comparer As IEqualityComparer(Of TKey),
	resultSelector As Expression(Of Func(Of TSource, TResult))
) As IQueryable(Of TResult)

public:
[ExtensionAttribute]
generic<typename TSource, typename TKey, typename TResult>
static IQueryable<TResult>^ HashPartition(
	IQueryable<TSource>^ source, 
	Expression<Func<TSource, TKey>^>^ keySelector, 
	IEqualityComparer<TKey>^ comparer, 
	Expression<Func<TSource, TResult>^>^ resultSelector
)