MoreEnumerableRankByTSource, TKey(IEnumerableTSource, FuncTSource, TKey, IComparerTKey) Method
            Ranks each item in a sequence using a specified key and a caller-supplied comparer
            
Namespace: MoreLinqAssembly: MoreLinq (in MoreLinq.dll) Version: 4.4.0+6d97c3b1d482f98300f4446df14742b0e3fafbec
public static IEnumerable<int> RankBy<TSource, TKey>(
	this IEnumerable<TSource> source,
	Func<TSource, TKey> keySelector,
	IComparer<TKey>? comparer
)
<ExtensionAttribute>
Public Shared Function RankBy(Of TSource, TKey) ( 
	source As IEnumerable(Of TSource),
	keySelector As Func(Of TSource, TKey),
	comparer As IComparer(Of TKey)
) As IEnumerable(Of Integer)
public:
[ExtensionAttribute]
generic<typename TSource, typename TKey>
static IEnumerable<int>^ RankBy(
	IEnumerable<TSource>^ source, 
	Func<TSource, TKey>^ keySelector, 
	IComparer<TKey>^ comparer
)
[<ExtensionAttribute>]
static member RankBy : 
        source : IEnumerable<'TSource> * 
        keySelector : Func<'TSource, 'TKey> * 
        comparer : IComparer<'TKey> -> IEnumerable<int> 
- source  IEnumerableTSource
- The sequence of items to rank
- keySelector  FuncTSource, TKey
- A key selector function which returns the value by which to rank items in the sequence
- comparer  IComparerTKey
- An object that defines the comparison semantics for keys used to rank items
- TSource
- The type of the elements in the source sequence
- TKey
- The type of the key used to rank items in the sequence
IEnumerableInt32A sequence of position integers representing the ranks of the corresponding items in the sequenceIn Visual Basic and C#, you can call this method as an instance method on any object of type 
IEnumerableTSource. When you use instance method syntax to call this method, omit the first parameter. For more information, see 
Extension Methods (Visual Basic) or 
Extension Methods (C# Programming Guide).