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LINQ to Objects

Aggregation

Aggregate, Average, Count, LongCount, Max, Min, Sum

      Aggregate (simple)       Aggregate (seed)       Average       Count       LongCount       Max       Min       Sum

Conversion

AsEnumerable, Cast, OfType, ToArray, ToDictionary, ToList, ToLookup

      AsEnumerable       Cast       OfType       ToArray       ToDictionary (simple)       ToDictionary (conditional)       ToList       ToLookup

Element

ElementAt, ElementAtOrDefault, First, FirstOrDefault, Last, LastOrDefault, Single, SingleOrDefault

      ElementAt       ElementAtOrDefault       First (simple)       First (conditional)       FirstOrDefault       Last       LastOrDefault (simple)       LastOrDefault (conditional)       Single       SingleOrDefault

Generation

DefaultIfEmpty, Empty, Range, Repeat

      DefaultIfEmpty (simple)       DefaultIfEmpty (default value)       Empty       Range       Repeat

Grouping

GroupBy

      GroupBy

Join

GroupJoin, Join

      GroupJoin (left outer join)       Join (inner join)

Ordering

OrderBy, OrderByDescending, Reverse, ThenBy, ThenByDescending

      OrderBy (simple - numbers)       OrderBy (simple - dates)       OrderBy (simple - objects)       OrderByDescending       Reverse       ThenBy       ThenByDescending

Other

Concat, SequenceEqual, Zip

      Concat (simple - numbers)       Concat (simple - strings)       SequenceEqual       Zip

Partitioning

Skip, SkipWhile, Take, TakeWhile

      Skip       SkipWhile       Take       TakeWhile

Projection

Select, SelectMany

      Select (simple)       Select (anonymous type)       Select (indexed)       SelectMany (cross join)

Quantifiers

All, Any, Contains

      All       Any       Contains

Restriction

Where

      Where (simple - numbers)       Where (simple - objects)       Where (indexed)

Set

Distinct, Except, Intersect, Union

      Distinct       Except       Intersect       Union
  Close

AsEnumerable

Lambda Query

AsEnumerable: casts a collection to IEnumerable of same type.

AsEnumerable: casts a collection to IEnumerable of same type.

This Lambda Expression sample casts array of strings to its corresponding IEnumerable.

This Lambda Expression sample casts array of strings to its corresponding IEnumerable.

  • C#
  • VB.Net
  • F#
// A Query Expression cannot be constructed for AsEnumerable() in C#.
// Consider using a Lambda Expression instead.
' A Query Expression cannot be constructed for AsEnumerable() in VB.NET.
' Consider using a Lambda Expression instead.
// A Query Expression cannot be constructed for AsEnumerable() in F#.
// Consider using a Lambda Expression instead.
  • C#
  • VB.Net
  • F#
static void Sample_AsEnumerable_Lambda()
{
    string[] names = { "John", "Suzy", "Dave" };

    var result = names.AsEnumerable();

    Debug.WriteLine("Iterating over IEnumerable collection:");
    foreach (var name in result)
        Debug.WriteLine(name);
}
Output:
Iterating over IEnumerable collection:
John
Suzy
Dave
Private Shared Sub Sample_AsEnumerable_Lambda()
    Dim names As String() = {"John", "Suzy", "Dave"}

    Dim result = names.AsEnumerable()

    Debug.WriteLine("Iterating over IEnumerable collection:")
    For Each name In result
        Debug.WriteLine(name)
    Next
End Sub
Output:
Iterating over IEnumerable collection:
John
Suzy
Dave
let Sample_AsEnumerable_Lambda() =
    let names = [|"John"; "Suzy"; "Dave"|]

    let result = names.AsEnumerable()

    Debug.WriteLine(sprintf "Iterating over IEnumerable collection:")
    for name in names do
        Debug.WriteLine(sprintf "%s" name)
Output:
Iterating over IEnumerable collection:
John
Suzy
Dave

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