public static IQueryable<T2> SlidingWindow<T1, T2>(
	this IQueryable<T1> source,
	Expression<Func<IEnumerable<T1>, T2>> procFunc,
	int windowSize
)

<ExtensionAttribute> 
Public Shared Function SlidingWindow(Of T1, T2) ( 
	source As IQueryable(Of T1),
	procFunc As Expression(Of Func(Of IEnumerable(Of T1), T2)),
	windowSize As Integer
) As IQueryable(Of T2)

public:
[ExtensionAttribute]
generic<typename T1, typename T2>
static IQueryable<T2>^ SlidingWindow(
	IQueryable<T1>^ source, 
	Expression<Func<IEnumerable<T1>^, T2>^>^ procFunc, 
	int windowSize
)