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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

OrderBy (simple - numbers)

Lambda Query

OrderBy: Sorts a collection in ascending order.

OrderBy: Sorts a collection in ascending order.

This Lambda Expression sample sorts array of numbers in ascending order.

This Lambda Expression sample sorts array of numbers in ascending order.

  • C#
  • VB.Net
  • F#
static void Sample_OrderBy_Linq_Numbers()
{
    int[] numbers = { 7, 9, 5 };

    var result = from n in numbers
                 orderby n
                 select n;

    Debug.WriteLine("Ordered list of numbers:");
    foreach (int number in result)
        Debug.WriteLine(number);
}
Output:
Ordered list of numbers:
5
7
9
Private Shared Sub Sample_OrderBy_Linq_Numbers()
    Dim numbers As Integer() = {7, 9, 5}

    Dim result = From n In numbers Order By n

    Debug.WriteLine("Ordered list of numbers:")
    For Each number As Integer In result
        Debug.WriteLine(number)
    Next
End Sub
Output:
Ordered list of numbers:
5
7
9
// There is no OrderBy() for Query Expressions in F#, but it has the similar "sortBy".
let Sample_OrderBy_Linq_Numbers() =
    let numbers = [|7; 9; 5|]

    let result = query {
        for n in numbers do
        sortBy n
        select n       
    }

    Debug.WriteLine(sprintf "Ordered list of numbers:")
    for number in result do
        Debug.WriteLine(sprintf "%d" number)
Output:
Ordered list of numbers:
5
7
9
  • C#
  • VB.Net
  • F#
static void Sample_OrderBy_Lambda_Numbers()
{
    int[] numbers = { 7, 9, 5 };

    var result = numbers.OrderBy(n => n);

    Debug.WriteLine("Ordered list of numbers:");
    foreach (int number in result)
        Debug.WriteLine(number);
}
Output:
Ordered list of numbers:
5
7
9
Private Shared Sub Sample_OrderBy_Lambda_Numbers()
    Dim numbers As Integer() = {7, 9, 5}

    Dim result = numbers.OrderBy(Function(n) n)

    Debug.WriteLine("Ordered list of numbers:")
    For Each number As Integer In result
        Debug.WriteLine(number)
    Next
End Sub
Output:
Ordered list of numbers:
5
7
9
let Sample_OrderBy_Lambda_Numbers() =
    let numbers = [|7; 9; 5|]

    let result = numbers.OrderBy(fun n -> n);

    Debug.WriteLine(sprintf "Ordered list of numbers:")
    for number in result do
        Debug.WriteLine(sprintf "%d" number)
Output:
Ordered list of numbers:
5
7
9

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