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Enumerable.ToArray(Of TSource) Method

Creates an array from a IEnumerable(Of T).

Namespace:  System.Linq
Assemblies:   System.Linq (in System.Linq.dll)
  System.Core (in System.Core.dll)

<ExtensionAttribute> _
Public Shared Function ToArray(Of TSource) ( _
	source As IEnumerable(Of TSource) _
) As TSource()

Type Parameters


The type of the elements of source.


Type: System.Collections.Generic.IEnumerable(Of TSource)

An IEnumerable(Of T) to create an array from.

Return Value

Type: TSource()
An array that contains the elements from the input sequence.

Usage Note

In Visual Basic and C#, you can call this method as an instance method on any object of type IEnumerable(Of TSource). 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).


source is Nothing.

The ToArray(Of TSource)(IEnumerable(Of TSource)) method forces immediate query evaluation and returns an array that contains the query results. You can append this method to your query in order to obtain a cached copy of the query results.

ToList(Of TSource) has similar behavior but returns a List(Of T) instead of an array.

The following code example demonstrates how to use ToArray(Of TSource) to force immediate query evaluation and return an array of results.

    Structure Package
        Public Company As String 
        Public Weight As Double 
    End Structure 

    Sub ToArrayEx1()
        ' Create a list of Package values. 
        Dim packages As New List(Of Package)(New Package() _
             {New Package With {.Company = "Coho Vineyard", .Weight = 25.2}, _
              New Package With {.Company = "Lucerne Publishing", .Weight = 18.7}, _
              New Package With {.Company = "Wingtip Toys", .Weight = 6.0}, _
              New Package With {.Company = "Adventure Works", .Weight = 33.8}})

        ' Project the Company values from each item in the list 
        ' and put them into an array. 
        Dim companies() As String = _
            packages _
            .Select(Function(pkg) pkg.Company) _

        ' Display the results. 
        Dim output As New System.Text.StringBuilder
        For Each company As String In companies
    End Sub 

    ' This code produces the following output: 
    ' Coho Vineyard 
    ' Lucerne Publishing 
    ' Wingtip Toys 
    ' Adventure Works

.NET Framework

Supported in: 4.6, 4.5, 4, 3.5

.NET Framework Client Profile

Supported in: 4, 3.5 SP1

XNA Framework

Supported in: 3.0

.NET for Windows Phone apps

Supported in: Windows Phone 8.1, Windows Phone Silverlight 8.1, Windows Phone Silverlight 8

Portable Class Library

Supported in: Portable Class Library
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