MoreEnumerableIndexTSource(IEnumerableTSource) Method
            Returns a sequence of 
KeyValuePairTKey, TValue
            where the key is the zero-based index of the value in the source
            sequence.
            
Namespace: MoreLinqAssembly: MoreLinq (in MoreLinq.dll) Version: 4.1.0+0e154ef592f33ce0f6f3d534a9eedee273f0ce72
public static IEnumerable<KeyValuePair<int, TSource>> Index<TSource>(
	this IEnumerable<TSource> source
)
<ExtensionAttribute>
Public Shared Function Index(Of TSource) ( 
	source As IEnumerable(Of TSource)
) As IEnumerable(Of KeyValuePair(Of Integer, TSource))
public:
[ExtensionAttribute]
generic<typename TSource>
static IEnumerable<KeyValuePair<int, TSource>>^ Index(
	IEnumerable<TSource>^ source
)
[<ExtensionAttribute>]
static member Index : 
        source : IEnumerable<'TSource> -> IEnumerable<KeyValuePair<int, 'TSource>> 
- source  IEnumerableTSource
 - The source sequence.
 
- TSource
 - Type of elements in source sequence.
 
IEnumerableKeyValuePairInt32, 
TSourceA sequence of 
KeyValuePairTKey, TValue.In 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).
 This operator uses deferred execution and streams its
            results.