QueryableExtensionMethodsForDTOsOptionalOrderByT Method

Part of LLBLGen Pro's functionality to project entity queries to generated DTO classes. Don't use this method in your own code. Extension method for enumerables in DTO projections which have been converted to queryables to append an orderby clause conditionally: if it's null, no call to OrderBy is appended, otherwise a call to OrderBy with the lambda provided is appended. This is done at evaluation time, hence this method's body isn't used as the call to this method is expected to be done inside a method which builds a projection.

public static IQueryable<T> OptionalOrderBy<T>(
	this IQueryable<T> source,
	List<ValuePair<Expression, bool>> orderByClauses
)

<ExtensionAttribute>
Public Shared Function OptionalOrderBy(Of T) ( 
	source As IQueryable(Of T),
	orderByClauses As List(Of ValuePair(Of Expression, Boolean))
) As IQueryable(Of T)