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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

ToArray

Lambda Query

ToArray: Converts type to a new array.

ToArray: Converts type to a new array.

This Lambda Expression sample converts one array to another.

This Lambda Expression sample converts one array to another.

  • C#
  • VB.Net
  • F#
static void Sample_ToArray_Linq()
{
    int[] numbers = { 1, 2, 3, 4 };

    var result = from n in numbers.ToArray<int>()
                 select n;

    Debug.WriteLine("New array contains identical values:");
    foreach (int number in result)
        Debug.WriteLine(number);
}
Output:
New array contains identical values:
1
2
3
4
Private Shared Sub Sample_ToArray_Linq()
    Dim numbers As Integer() = {1, 2, 3, 4}

    Dim result = From n In numbers.ToArray()
                 Select n

    Debug.WriteLine("New array contains identical values:")
    For Each number As Integer In result
        Debug.WriteLine(number)
    Next
End Sub
Output:
New array contains identical values:
1
2
3
4
let Sample_ToArray_Linq() =
    let numbers = [|1; 2; 3; 4|]

    let result = query {
        for n in numbers.ToArray<int>() do
        select n
    }

    Debug.WriteLine(sprintf "New array contains identical values:")
    for number in result do
        Debug.WriteLine(sprintf "%d" number)
Output:
New array contains identical values:
1
2
3
4
  • C#
  • VB.Net
  • F#
static void Sample_ToArray_Lambda()
{
    int[] numbers = { 1, 2, 3, 4 };

    var result = numbers.ToArray();

    Debug.WriteLine("New array contains identical values:");
    foreach (int number in result)
        Debug.WriteLine(number);
}
Output:
New array contains identical values:
1
2
3
4
Private Shared Sub Sample_ToArray_Lambda()
    Dim numbers As Integer() = {1, 2, 3, 4}

    Dim result = numbers.ToArray()

    Debug.WriteLine("New array contains identical values:")
    For Each number As Integer In result
        Debug.WriteLine(number)
    Next
End Sub
Output:
New array contains identical values:
1
2
3
4
let Sample_ToArray_Lambda() =
    let numbers = [|1; 2; 3; 4|]

    let result = numbers.ToArray()

    Debug.WriteLine(sprintf "New array contains identical values:")
    for number in result do
        Debug.WriteLine(sprintf "%d" number)
Output:
New array contains identical values:
1
2
3
4

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