XEnumerableToHierarchyTSource, TId Method

public static IEnumerable<INode<TSource>> ToHierarchy<TSource, TId>(
	this IEnumerable<TSource> source,
	Func<TSource, TId> idSelector,
	Func<TSource, TId> parentIdSelector,
	TId rootParentId = null
)

<ExtensionAttribute>
Public Shared Function ToHierarchy(Of TSource, TId) ( 
	source As IEnumerable(Of TSource),
	idSelector As Func(Of TSource, TId),
	parentIdSelector As Func(Of TSource, TId),
	Optional rootParentId As TId = Nothing
) As IEnumerable(Of INode(Of TSource))

[<ExtensionAttribute>]
static member ToHierarchy : 
        source : IEnumerable<'TSource> * 
        idSelector : Func<'TSource, 'TId> * 
        parentIdSelector : Func<'TSource, 'TId> * 
        ?rootParentId : 'TId 
(* Defaults:
        let _rootParentId = defaultArg rootParentId null
*)
-> IEnumerable<INode<'TSource>>