void UpdateHash<T>(
	IEnumerable<T> data,
	string cacheKey,
	Nullable<TimeSpan> lifeSpan
)

Sub UpdateHash(Of T) ( _
	data As IEnumerable(Of T), _
	cacheKey As String, _
	lifeSpan As Nullable(Of TimeSpan) _
)

generic<typename T>
void UpdateHash(
	IEnumerable<T>^ data, 
	String^ cacheKey, 
	Nullable<TimeSpan^> lifeSpan
)